Features
Challenges in meeting President’s target
Development of renewable energy projects II –
By Dr Janaka Ratnasiri
The comments made by the President at the meeting he had on 15.12.2020 to discuss the development of renewable energy (RE) projects were highlighted in recent media reports, as described in the writer’s earlier write-up which appeared in The Island of 28.12.2020 under the same heading. However, there was no reference in these reports to any feedback that would have been made by officials present. The purpose of this write-up is to discuss likely issues that would have been of concern to institution officials and the challenges they may have to face in meeting the President’s target.
FEARS OF DESTABILIZING THE SYSTEM
The first challenge is to change the mindset of professionals concerned. Energy experts both within the Ceylon Electricity Board (CEB) and outside have been saying for years that connecting too many of RE plants such as wind and solar power systems to the grid will cause its destabilization, not being able to maintain the voltage and the frequency within permitted limits. The output of these RE supplies keep fluctuating momentarily, hourly and diurnally and the problem is how to balance the supply and load under such dynamic conditions. It was also said that excess harmonics generated during conversion of direct current (DC) output from solar systems or from DC wind turbines into alternating current (AC) for feeding into the grid could degrade the quality of the supply.
According to a website on RE systems, “Impacts caused by high penetration levels of intermittent renewable distributed generation can be complex and severe and may include voltage increase, voltage fluctuation, interaction with voltage regulation and control equipment, reverse power flows, temporary overvoltage, power quality and protection concerns, and current and voltage unbalance, among others. The uncertainty and intermittency of wind and solar generation are major complications that must be addressed before the full potential of these renewables can be reached”. These challenges require advanced control strategies to solve the problems effectively.
PROBLEMS ASSOCIATED WITH RENEWABLE ENERGY SYSTEMS
One problem associated with RE systems is that they are not considered dispatchable, which means that their output is not available as and when necessary, unlike in the case of thermal power plants. Wind power output is available only when wind blows which keeps changing in a stochastic manner hourly, diurnally and seasonally. In Sri Lanka, wind is generally strong during the second half of the year than in the first half. In the case of solar panels, their output is available only during the daytime peaking at noon and declining with the increasing solar angle. Even during daytime, the output would drop if there is cloud cover or rainfall. If there is extended periods of bad weather, a consumer has to depend on some back-up power.
According to the CEB Chairman’s Review given in its 2018 Annual Report, “a study on Integration of Renewable Based Generation into Sri Lankan Grid 2020-2030 was conducted during the year (2018) with the objective of investigating the main challenges faced in renewable energy-based generation and determining the optimum level of renewable energy generation”. However, there is no report of this study available in the CEB’s website.
STORAGE SYSTEMS FOR RENEWABLE ENERGY PLANTS
In order to make use of solar energy that is generated during the day, at night time, it is necessary to store the electricity by suitable means. This also applies to wind energy to even out the fluctuating output into a steady output. If the system is connected to the grid, energy generated by solar systems during the day or by wind systems when the wind blows can be fed into the grid and the grid provides the electricity to the consumer during night time or when there is no wind blowing. Hence, there is no need for a separate storage facility with grid-connected systems.
For large scale solar systems, one method of storage is to make use of exiting hydro power reservoirs by saving the water which would have been used for generating an equivalent amount of energy generated by solar panels during the day, and using the water saved during night time. This does not require any additional expenditure on building extra facilities. Another is to build pump-storage facilities comprising two sets of reservoirs at two elevations connected via a penstock with a generator/pump system at the bottom. Already one such system is being planned at Aranayaka.
Any surplus energy generated during the day from solar panels or when wind blows is made use of to pump water from the lower reservoir to the upper reservoir. At night time or when there is no wind, the pumped water is allowed to flow down the penstock driving the pump in the reverse mode to generate electricity. In the West, such pump-storage systems have been used for many decades for peaking purposes. One good example is the system installed at the Niagara Falls.
HYDROGEN SYSTEMS FOR STORAGE
Another method available is to feed the solar panel output to a set of electrolyzers, which are available commercially today, to generate hydrogen by splitting water. Hydrogen generated is stored and fed to a bank of fuel-cells to generate electricity in the form of direct current (DC) and later inverted to AC. After filtering out harmonics, this steady output is fed to the grid as and when necessary, day or night, using the stored hydrogen which makes it dispatchable. Each solar or wind or hybrid energy park that is being planned could be supplemented by such hydrogen storage system accompanied by a bank of fuel cells, enabling the output from these RE parks dispatchable.
There is much interest among developed countries to develop hydrogen energy systems. European Union has set out plans which could require up to € 470 billion (USD 570 billion) of investment in green hydrogen by 2050. Germany alone is targeting 5,000 MW of electrolysis capacity by 2030. Japan, a front-runner along with South Korea, is looking to sharply increase a target to import 300,000 tonnes a year of hydrogen in 2030. U.S. President Joe Biden wants to fund research into technology, including large-scale electrolyzers, to help make green hydrogen costs match conventional hydrogen within a decade. (https://energy.economictimes.indiatimes.com/news/renewable/explainer-why-green-hydrogen-is-finally-getting-its-day-in-the-sun/79672523).
PROPOSAL FOR ROOF-TOP SOLAR INSTALLATIONS
The 2021 Budget Speech states that a capacity of 500 MW will be added to the grid, by providing solar panels each generating 5 kW, to 100,000 houses of low-income families. At the meeting the President had on 15.12.2020 with the two Ministers and Ministry officials, he has said that the Government would bear the cost of LKR. 800,000 per house for installing solar cell panels under this project. This means the expenditure on this project will be about LKR 80 billion. The question arises who will be responsible for implementing this project? The SLSEA Act grants powers to it for “entertainment of applications for carrying on of on-grid and off-grid renewable energy projects”. It also has powers for “the development of guidelines on renewable energy projects and disseminating them among prospective investors”. Hence, the SLSEA may be assigned the task of coordinating the project.
The purchase of 100,000 roof-top panels and getting them installed is a challenge by itself. There is a large number of local companies, numbering about 200, involved in supplying and installing roof-top solar panels. The government should call for expressions of interest (EOI) from these companies to undertake this assignment requesting information on their track record and proof of their ability and competency. Next, bids need to be invited from selected companies after announcing detailed specifications for the panels.
It is important to specify in the bid document itself the limiting values for key parameters with tolerances that need to be met by the panel offered, without just saying that panels offered should conform to international standards, as normally done by the CEB. The evaluation of the bids would be much simpler and faster then. It is best if the supply is distributed among as many vendors as possible, after agreeing on a fixed price, to expedite the implementation of the project and avoid complaints from unsuccessful bidders.
POOR PLANNING FOR RENEWABLE ENERGY PROJECTS
Though the Cabinet of Ministers since 2016 has been taking decisions to introduce RE projects including solar power systems at both domestic level and utility scale, their follow up by the two implementing agencies, viz. SLSEA and the CEB has been rather slow, possibly due to divided responsibility. According to the SLSEA Act, any RE project needs the approval of the SLSEA before commencing any work.
The Electricity Act also requires accepting projects selected only after calling for tenders except those recommended by the SLSEA. The misinterpretation of the Electricity has resulted in projects recommended by the SLSEA getting held up by the CEB for extended periods. The CEB’s draft LTGE Plan for 2020-39 prepared in May 2019, plans to add only 165 MW of mini-hydro systems, 555 MW of wind systems, 880 MW of solar systems and 55 MW of biomass systems up to 2030. Even the SLSEA has failed to come out with a plan to develop RE systems in an optimal manner as highlighted in the Writer’s article in the Island of 28.12.2020.
This is despite the fact that the previous Cabinet decisions had wanted about 2,000 MW of solar power added within a shorter time frame, comprising 1000 MW of roof-top systems and 1000 MW of utility systems. As mentioned in the previous article, even the SLSEA has failed to come up with a plan to develop RE systems though it is a requirement given in its Act. So, another challenge is to get the CEB and SLSEA to enhance their plans for RE generation and fall in line with the Government policy. If they do not comply, the solution is not closing down of the PUCSL as highlighted in writer’s article in The Island of 25.12.2020. (See https://island.lk/cabinet-discussion-on-public-utilities-commission/)
INCOMPATIBILITY OF NEW COAL POWER PLANTS WITH INCREASED RE SHARE
One problem possibly encountered in increasing the RE share is the incorporation of several new coal power plants in the system by 2030. This increases the share of fossil fuel share leaving only a small fraction to be filled by RE systems. For example, the draft Plan for 2020-39 shows the demand in 2030 as 31,740 GWh, out of which 20,640 GWh (65%) will be from fossil fuels and 11,100 GWh (35%) from RE sources. Out of the 20,640 GWh expected from fossil fuel plants, 7,721 GWh (24%) will be from the two new coal power plants to be built at Norochcholai (600 MW) and Trincomalee (300 MW). Another 4,781 GWh (15%) will be from the existing coal power plant at Norochcholai.
This means by 2030, 12,502 GWh (39%) of the demand will be met from coal while another 8,140 GWh (26%) will be from oil or jointly 20,640 GWh (65%) from fossil fuels. If 70% of total demand is to be met from renewables, then only 30% could be generated from fossil fuels. This means that the RE contribution has to be 48,160 GWh if the fossil fuel contribution is to be maintained at 20,640 GWh, making the total supply to be 68,800 GWh, which is more than double the forecasted demand in 2030. In order to make achieving of 70% share from RE sources feasible, it is therefore imperative to limit the fossil fuel contribution to 9,520 GWh in order to maintain the total supply at 31,740 GWh.
The easiest way to achieve this target is to stop building the two new coal power plants at Norochcholai and at Trincomalee, and retire the 20-year-old existing coal plant at Norochcholai. Hence, building new coal power plants is not compatible with President’s target on RE share of 70% in electricity generation. The President should therefore give a clear directive to CEB to discontinue planning of new coal power plants disregarding what its Unions say.
It is reported in the media that a former Army Officer has been appointed as Vice-Chairman of CEB to help CEB “to achieve President Gotabaya Rajapaksa’s of goal promoting renewable energy and providing electricity at a minimal cost” (Island of 22.12.2020). Perhaps the new Vice-Chairman will keep those within CEB who oppose President’s move at bay, including the trade unions.
IMPROVING RESEARCH CAPABILITY OF CEB
According to the CEB Act of 1969, CEB has powers to conduct research into matters affecting the generation, distribution, transmission, supply and use of electricity (Article 12h). However, CEB’s Annual Reports do not refer to any research being done within the CEB. Students in the Physical Science stream having the highest scores at GCE (A level) examination get admitted to engineering courses and those who follow electrical engineering ending up in institutions like CEB.
It is a pity that the CEB management does not make use of this talented graduates to undertake research to seek solutions to such problems such as integrating RE systems into the grid, develop new storage systems and to provide other research and development support for RE systems. In 2019, the CEB has spent about LKR 97 Billion on importing fuel for thermal power plants (SD 2019).
With the introduction of large scale RE systems, part of this expenditure could be saved which could be utilized to set up a Research and Development (R&D) Division in CEB as provided for in its Act.
Perhaps, a senior academic with research experience in RE systems could be invited to set up the R&D Division and provide him with a team of young engineers comprising both electrical and ICT engineers with aptitude for research to undertake studies on how to make the grid smart as described above.
THE WAY FORWARD
If the full potential of the country’s RE resources is exploited, it will be possible to achieve the entire electricity generation from RE sources. It will also save hundreds of Billions of Rupees annually on importing fuel required for operating thermal power plants. However, there are many problems to surmount before this could be achieved. Among these are the following:
a. Change the mindset of senior officials controlling the power sector that changing from fossil fuels to RE sources to meet the base load requirements is technically feasible.
b. Discontinue building new coal power plants and retire the existing coal power plant by 2030 as their presence will exceed the 30% share from fossil fuels.
c. Introduce mechanisms for energy storage at utility scale through utilizing existing hydro power reservoirs or building pump-storage systems or adding large batteries or adding electrolyzer-fuel cell systems which are commercially available now.
d. Set up a R&D Division within CEB to seek solutions for problems associated with integration of utility scale RE systems into the grid.
e. Entertain investors directly for RE projects on build, own, operate and transfer (BOOT) basis by providing efficient, clear and transparent mechanism for accepting proposals and guaranteeing security of their investments.
f. Publish a set of guidelines prepared jointly by SLSEA, CEB and PUCSL for accepting and approving candidate RE projects proposed by investors on BOOT basis.
CONCLUSION
It is important for decision makers to take a wholistic view of the power sector in the country and take evidence-based decisions rather than taking a piecemeal approach. It is not possible to build more coal power plants on one hand and fix targets for increased RE share on the other. While the President wants more renewable energy projects, the Ministry and CEB want more coal power plants. The President should decide on his priorities. If his priority is to have more renewable energy share by 2030, then he should get CEB to give up building more coal power plants. He cannot have both. It is his biggest challenge.
Features
A new mediation law for smarter dispute resolution of civil and commercial disputes – II
(Part I of this article appeared in The Island yesterday.)
An examination of how some of the other countries have institutionalised mediation to address the problem of laws delays shows that an array of institutional devices have been adopted to provide for mediation not only as a voluntary option but also in some jurisdictions, as a mandatory requirement prior to litigation, to respond to serious issues of delays due to congestion in courts.
In the UK , in March 1994, the Lord Chancellor commissioned Lord Woolf to review the Rules of civil procedure with a view to improving access to Justice, reducing the cost of litigation and removing unnecessary complexity. The resulting Access to Justice Report (1996) triggered a series of reforms to improve the civil justice system primarily through the civil procedure rules (1999) which articulated that its overriding objective is to enable the court to deal with cases justly and at proportionate cost. In 2023, the Court of Appeal judgment in Churchill v. Merthyr Tydfil County Borough Council [2023] EWCA Civ 1416, decided that English courts do have the power to stay civil proceedings for, or order, parties to engage in mediation or another non-court- based dispute resolution process. The Rules were thereafter amended in 2024 to provide for the use of alternative dispute resolution (ADR) more proactively. These included rules that recognied that –
* promoting or using ADR is a means of achieving the overriding objective;
* the court has a duty to actively manage cases to further the overriding objective, including by ‘ordering or encouraging the parties to use, and facilitating the use of, alternative dispute resolution’ and ‘helping the parties to settle the whole or part of the case’
* in deciding a costs order, a court will have regard to all the circumstances of the case, including the conduct of the parties, including whether a party failed to comply with an order for ADR or unreasonably failed to engage in ADR.
An ADR pledge made by the UK Government in 2001 was renewed in 2011, by the Dispute Resolution Commitment (DRC) requiring departments to use mediation, arbitration and conciliation. At that time, the then Justice Minister Jonathan Djanogly said: ‘I believe that government should be leading by example by resolving issues away from court using alternatives which are usually quicker, cheaper and provide better outcomes. We want people to see court as a last resort rather than a first option, and cut down on the amount of unnecessary, expensive, painful and confrontational litigation in our society. In many cases methods like mediation are simply a common sense solution which benefits everyone involved. Although they will not be suitable in every case, they are already saving taxpayers millions every year and can save much more.’
The judicial dicta on the power of the courts to order mediation and the imposition of costs on even a successful party for unreasonable refusal to mediate, provides clear acceptance of a pro mediation approach by the UK courts.
In the USA , the discussion on the need for alternatives was raised in a speech made in 1906, by Roscoe Pound, a relatively unknown legal academic at the time, addressing the annual meeting of the American Bar Association (ABA). The title of his address was “The Causes of Popular Dissatisfaction with the Administration of Justice.” He critiqued the American legal system and charged that it was riddled with archaic technicalities, too slow, too expensive and adversarial and that there was injustice when procedure received emphasis above the substantive issues of a conflict. He spoke of the “sporting theory of justice” where litigation was considered as a game where the lawyers were gladiators battling in court to win. He charged that the contentious procedure compels ‘counsel to forget that they are officers of the court and to deal with the rules of law and procedure exactly as the professional football coach with the rules of the court.’ At the time, Pound’s criticisms were considered scandalous, blasphemous and the ABA refused to publish the speech. Things changed however.
Thirty years later, Roscoe Pound went on to become Dean of the Harvard Law School and became a celebrated legal luminary. As for the legal system – Roscoe Pounds sentiments were not dismissed. Seventy years later in 1976, the then Chief Justice Warren Burger convened the Pound Conference (called the second Pound Conference, with the first attributed to Pounds’ 1906 speech event), to consider whether Pounds’ criticisms had been adequately addressed and what more needed to be done. Professor Frank Sander of the Harvard Law School delivered the keynote address and spoke of his vision for a comprehensive Justice center (the “multi door court house”) where an alternative system would function parallel to the litigation system and disputes would be directed to the most appropriate process, such as arbitration and mediation.
The impact of these discussions resulted in significant changes to the dispute resolution landscape in the USA through statutes, inclusion of ADR in academic courses, and the professionalization of the practice of ADR processes, including mediation. Currently, arbitration and mediation are recognized within the mainstream legal system with resounding success. All the States have recognized ADR pathways including mediation, in statutes. Mediation is well entrenched in the USA and the success rate is reportedly very high.
Australia has institutionalized mediation through several statutory and other initiatives. Courts are empowered to refer disputes to mediation without the consent of the parties to enable better management of civil matters. The Civil Dispute Resolution Act, 2011 contains provisions to ensure that, other than in respect of certain excluded civil proceedings, parties must take “genuine steps” to resolve disputes prior to litigation. The Act obligates parties instituting proceedings in court to file a “genuine steps statement” setting out the steps taken to resolve issues or the reasons why no such steps were taken and further provides that a Lawyer acting for such a party must advise that party of the requirement and assist that party to comply with that requirement.
In Ireland, in the very recent case of Burke v O’Connell [2026] IEHC 314 (May 20, 2026), the High Court considered whether a court can order parties to mediate a dispute, against their will, or whether a court is restricted to simply inviting the parties to mediate. Among other issues, the court considered whether mandatory court ordered mediation is a breach of a constitutional right of access to courts, and decided that a court delaying court proceedings for court ordered Mediation, even against the will of the parties, would not constitute a breach of the right access to the courts under the Constitution or the European Convention on Human Rights, and that judges in Ireland regularly make clear that the right of access to the courts is not unconditional. Importantly the court observed that the court is not directing the parties to reach an agreement but simply to commence a mediation. The Court also observed that a court directed mediation order is a very limited order which does not compel settlement and only requires parties to commence a Mediation process and that while attendance at Mediation may not be voluntary, reaching a settlement is voluntary and made order that a court, in controlling its own process, did have the power to direct Mediation in appropriate cases, and that it was an inherent power of the court to ensure the effective and efficient operation of the courts.
The Indian Mediation Act, 2023 articulates a pro mediation policy and provides for mediation via a court annexed scheme for which detailed statutory provisions are included. The Act states that parties may voluntarily, and whether there is a mediation agreement or not, take steps to pursue court annexed pre litigation mediation and provides for the steps to be taken therefor (section 5). The Act provides further that, even if such pre litigation mediation is unsuccessful, a court or tribunal may, at any stage of the proceedings, refer parties to undertake mediation and that when a court so refers a dispute, there is no obligation on the parties to come to a settlement (section 7). In respect of high value commercial disputes however, a plaintiff is required to exhaust ‘the remedy of pre institution mediation’ prior to instituting action, unless urgent interim relief is sought – section 12A introduced by the Commercial Courts, Commercial Division, and Commercial Appellate Division of High Courts (Amendment) Act, No. 28 of 2018.
In South Africa, parties are mandated to consider mediation before initiating litigation in the High Court. Challenged by a serious issue of a severe backlog, with trial dates scheduled even up to 2031, a Directive was issued by the Judge President of the Gauteng Division of the High Court along with a detailed process Protocol, effective April 2025 to require mandatorily that prospective litigants in all civil matters within the Gauteng division must participate meaningfully in a court-annexed mediation process before they can be allocated a trial date. The protocol requires, among other documents, that a Report of the Mediator stating, among other matters, whether parties “participated in good faith” be filed, to obtain a trial date. This requirement has been included to avoid what the Judge President refers to as “sham mediations.” (https://www.youtube.com/watch?v=v5Gmkzfu8gA&t=425s) Non-compliance results in matters being struck off the roll and could lead to adverse or punitive cost orders. Currently, a challenge to this Directive by the Personal Injury Plaintiff Lawyers Association and the Law Society of South Africa is pending, without a stay of the Rule.
Singapore has emerged as a global leader in the practice of mediation. The Mediation Act 2017 provides for a framework for the use of mediation and for enforcement of a mediated settlement agreement as a decree of court. Mediation is well entrenched in the legal system of Singapore and enjoys the support of government as well as the judiciary. Singapore played a key role in UNCITRAL in the deliberations that led to the drafting of the text for the 1998 UN Mediation Convention and was host to the Convention signing ceremony in August 1999 where a historical number of 46 countries, including Sri Lanka, signed the Convention on the very first day. Many of the training programmes for Sri Lankans that have been arranged by the International ADR Center, have been conducted by the Singapore International Mediation Centre (SIMC) which is renowned for its programmes and for services to handle international commercial disputes.
The European Union Directive (EU Directive 2008/52/EC) provides that a court may, when appropriate and having regard to all the circumstances of the case, invite parties to use mediation (Article 5.1) and that the Directive is without prejudice to national legislation to making the use of mediation compulsory or subjective to incentives or sanctions … provided that such legislation does not prevent the parties from exercising their right of access to the judicial system (Article 5.2). Many European countries have integrated mediation into their dispute resolution systems through legislation or procedural laws in ways that range from recognizing voluntary reference to mediation to requiring mandatory mediation for specified categories of disputes. Countries such as Italy, Greece, Germany and Belgium are some that have robust systems.
It is clear therefore, that jurisdictions around the world, irrespective of the legal system, have sought to recognize mediation for its value not only for minor community dispute resolution but also for the resolution of high value commercial and other family and civil dispute resolution. UNCITRALs preparation of the text for the 1988 UN Mediation Convention was inspired by the significant increase in the use of mediation in international trade and the need for a uniform regime for enforcement, such as the UN NY Arbitration Convention provides in respect of arbitration awards.
Sri Lanka’s advancements have thus far been driven by the private sector. A holistic approach to find responses to the backlog in courts to relieve the pressure on courts, is desired. The promotion of ADR, including mediation, deserves support from the government as well, since, clearly, laws delays have an adverse impact on the economy of the country and should not be seen only as an access to justice issue. As articulated in the UN Mediation Convention, among the positive beneficial results of using mediation for dispute resolution, is that there are cost savings for the State. It is a means of resolving disputes without detracting from the quality of the resolution.
by Dhara Wijayatilake
Attorney at Law; Former Secretary to the Ministry of Justice; Director and Secretary General of the International ADR Center
Features
Killing of Colombo’s ancient trees — a warning on UN’s World Desertification Day – 17 June
In recent years, falling trees have claimed lives, destroyed homes, and sparked an urgent debate: should Colombo’s ancient trees be cut down in the name of safety? But this is the wrong question. The real crisis is not that these trees are dangerous — it is that we have made them so. Through decades of road widening, root-smothering pavements, and indiscriminate branch cutting, we have steadily undermined the very trees we now fear. What we are witnessing is not nature failing us. It is us failing nature. As the world marks World Desertification Day on 17th June, Sri Lanka would do well to reflect that desertification does not begin only in distant, arid lands — it begins whenever a city turns its back on its own green heritage.
In recent years, falling trees have claimed lives, destroyed homes, and sparked an urgent debate: should Colombo’s ancient trees be cut down in the name of safety? But this is the wrong question. The real crisis is not that these trees are dangerous — it is that we have made them so. Through decades of road widening, root-smothering pavements, and indiscriminate branch cutting, we have steadily undermined the very trees we now fear. What we are witnessing is not nature failing us. It is us failing nature.
Colombo, our commercial capital, is considered one of the greenest cities in the world. This is highlighted by the award of the world’s first Wetland City designation to our administrative capital, Sri Jayewardenepura Kotte. Both cities and their green heritage should be treasured and protected — not only as assets of their citizens, but as a matter of national pride.
It is against this backdrop that one must view with deep concern the ongoing destruction of trees and greenery across Sri Lanka, particularly in urban settings such as Colombo and Kotte. The majestic trees lining our traditional tanks, rural areas, and urban areas are part of our heritage. The trees lining Colombo’s Ananda Coomaraswamy Mawatha (previously named the Green Path because of its large trees), Gregory’s Road, Thurstan Road, and Bauddhaloka Mawatha, are over a hundred years old. These are living monuments of our heritage. They provide shade, a natural canopy, and a habitat for a remarkable diversity of bird populations within the city. It is therefore vital that we make every effort to preserve these trees unless they pose a direct danger to human life.
Why Do These Trees Become Dangerous?
To address this question, we must first understand why large trees continue to fall during periods of strong winds. Old photographs indicate that it is we who have widened roads and built pavements to cover the roots of these majestic trees, a true heritage from the past.
A leading reason for trees to fall is age-related decay. Old trees tend to develop weak branches and trunks. Regular inspection of their structural integrity and timely treatment of disease would go a long way in preventing such failures.
The second reason is indiscriminate cutting of branches, which disrupts the natural balance of the tree. A principal offender in this regard is the Ceylon Electricity Board. When interviewing workers engaged in trimming city trees, one consistently hears the same justification: the branch must be cut because it is touching or close to a power line. There are no arborists, trained experts, or senior officials to guide these workers or determine whether a less destructive approach is possible.
The third reason is the destruction of root systems. Across the city, one can observe concrete and paving laid directly over the root zones of large trees. This prevents oxygenation and moisture from reaching the roots, causing them to deteriorate or die. The inevitable consequence is that the tree gradually loses its structural support at the base, making it vulnerable to falling.
What Should Municipalities and Town Councils Do?
To save our ancient trees, we must counter the flawed argument that we need to replace them—these trees are priceless “nature’s investments for hundreds of years” and, as a BBC article on ancient oaks suggests, their genetic heritage is vital for resilient future forests. See “1,000-year-old oaks used to create ‘super forest’ (See )
* A nationwide strategy is essential: we must start by strengthening the expertise of tree officers in the Colombo Municipal Council and other urban councils to ensure professional health assessments are available, while also linking with botanists, academics, and environmental groups at the University of Colombo.
* Use Google Maps and GIS for systematic mapping and reviving a citizen science platform, similar to one previously developed by University of Moratuwa, where students and the public can report environmental harm with photos and locations.
* Technology offers more powerful tools. There are Conventional Visual Tree Risk Assessment (VTRA) methods which fail to detect risks. More advanced methods were reported at the 30 th International Forestry and Environment Symposium 2026 e.g. Ground Penetrating Radar (GPR). These are able to find trunk decay and found examples in urban trees at Viharamahadevi park and Keppetipola road.
* We can raise public awareness through social media and community events like “tree walks,” a practice which could be further popularized by groups like Ruk Rakaganno (see ) and the Love A Tree Foundation (see )
* Finally, we must learn from international models like the UK’s Ancient Tree Forum (see ). The latter specialises in protecting trees as a heritage which must be preserved and protected for future generations.
by Saroj Jayasinghe
Emeritus Professor
Consultant Physician
Features
Dengue and its prevention: A global public health challenge
Dengue is one of the fastest spreading mosquito-borne viral diseases in the world today, posing a growing threat to nearly half of the global population. The World Health Organization describes dengue as a viral infection transmitted to humans through the bite of infected female mosquitoes, primarily Aedes aegypti and, to a lesser extent, Aedes albopictus. Once considered a disease limited to tropical regions, dengue has now expanded widely across continents, driven by urbanization, climate change, population movement, and weak vector control systems.
The global burden of dengue has increased dramatically over recent decades. According to WHO estimates, there are approximately 100 to 400 million infections annually, although a large proportion remain asymptomatic or undiagnosed. The disease is now endemic in over 100 countries, with Asia bearing the highest share of cases, followed by Latin America and Africa. As transmission intensifies and outbreaks become more frequent, dengue has emerged as a major public health concern requiring coordinated prevention and control strategies.
The nature of dengue infection
Dengue is caused by four closely related viruses known as serotypes: DENV-1, DENV-2, DENV-3, and DENV-4. Infection with one serotype provides lifelong immunity to that specific strain, but only partial and temporary protection against the others. This means a person can be infected up to four times in their lifetime.
Most dengue infections are asymptomatic or mild. When symptoms do occur, they typically appear 4 to 10 days after the bite of an infected mosquito. The clinical presentation includes high fever, severe headache, pain behind the eyes, muscle and joint pain, nausea, vomiting, rash, and fatigue. Because these symptoms resemble other viral infections, dengue is often underdiagnosed in early stages.
While most patients recover within one to two weeks, a small proportion develop severe dengue. This life-threatening condition is characterised by plasma leakage, severe bleeding, organ impairment, and shock. Without timely medical intervention, severe dengue can be fatal. WHO emphasises that early diagnosis and appropriate clinical management can reduce fatality rates to below 1 percent in well-managed settings.
Transmission and mosquito ecology
Dengue is transmitted primarily through the bite of infected female Aedes mosquitoes. These mosquitoes are highly adapted to urban environments and typically breed in artificial water containers found in and around homes. Unlike malaria-transmitting mosquitoes, Aedes mosquitoes bite during the daytime, with peak activity in the early morning and late afternoon.
The lifecycle of the mosquito plays a crucial role in transmission. Eggs can survive for months in dry conditions and hatch when they come into contact with water. Even small collections of water, such as flower pots, discarded containers, tyres, and water storage tanks, can serve as breeding sites.
Urbanisation has significantly contributed to the spread of dengue. Rapid population growth in cities often leads to overcrowding, poor waste management, and inadequate water storage practices, all of which create ideal breeding conditions for mosquitoes. Climate factors such as increased rainfall, humidity, and temperature further enhance mosquito survival and virus replication.
Risk factors and global expansion
Several factors increase the risk of dengue transmission. Population density is a key driver, as densely populated urban areas provide abundant human hosts for mosquitoes. Inadequate housing conditions and poor access to clean water force communities to store water in containers, which often become breeding grounds.
Human mobility also contributes to the spread of the disease, as infected individuals can introduce the virus into new regions where competent mosquito vectors are present. Climate change has expanded the geographical range of Aedes mosquitoes into previously unaffected areas, increasing the risk of outbreaks in both tropical and subtropical regions.
WHO has noted that dengue incidence has increased significantly over the past 50 years, with periodic outbreaks becoming more frequent and severe. The disease is now considered a major global health threat, comparable in burden to other high-impact infectious diseases in many regions.
Clinical management and absence of specific treatment
There is currently no specific antiviral treatment for dengue. Management is supportive and focuses on relieving symptoms and preventing complications. Paracetamol is recommended to reduce fever and pain, while non-steroidal anti-inflammatory drugs such as ibuprofen and aspirin are avoided due to their risk of increasing bleeding.
Patients with severe dengue require hospitalisation for close monitoring and supportive care, including intravenous fluid replacement and management of shock or bleeding. With proper medical care, mortality rates can be significantly reduced.
Early detection is critical. Warning signs such as persistent vomiting, severe abdominal pain, bleeding gums, rapid breathing, and sudden fatigue indicate progression to severe dengue and require immediate medical attention.
Prevention: the cornerstone of dengue control
Since there is no specific cure, prevention remains the most effective strategy against dengue. WHO strongly emphasises integrated vector management as the foundation of dengue control.
Personal protection measures are essential, especially during daytime hours when mosquitoes are most active. These include the use of mosquito repellents containing DEET, picaridin, or IR3535, wearing long-sleeved clothing, and using mosquito nets when resting during the day. Window and door screens also help reduce indoor mosquito exposure.
Environmental management is equally important. Communities are encouraged to eliminate breeding sites by removing stagnant water, disposing of waste properly, and cleaning water storage containers regularly. Even small water collections can sustain mosquito populations, making household-level participation crucial.
Public health programmes also rely on insecticide spraying during outbreaks to rapidly reduce mosquito populations. However, WHO emphasises that chemical control alone is insufficient without sustained community involvement and environmental management.
Community participation and public health response
Community engagement is a central pillar of dengue prevention. Effective control requires continuous participation from households, schools, workplaces, and local authorities. Public awareness campaigns play a vital role in educating populations about mosquito breeding habits and personal protection measures.
Surveillance systems are also essential for early outbreak detection and response. Health authorities monitor dengue cases and mosquito populations to identify high-risk areas and implement targeted interventions.
Integrated approaches that combine environmental management, biological control, chemical interventions, and public education have proven most effective in reducing transmission.
Vaccination and emerging tools
In recent years, dengue vaccines have been developed and introduced in some countries under specific conditions. WHO has recommended the use of certain vaccines in areas with high transmission, particularly for populations with prior exposure to dengue. However, vaccination strategies remain limited and must be carefully implemented due to the complexity of immune responses to dengue infection.
Research continues into new tools such as genetically modified mosquitoes, Wolbachia-infected mosquitoes that reduce virus transmission, and improved diagnostic technologies. These innovations offer promising additional tools but are not yet substitutes for established prevention measures.
Dengue remains a rapidly growing global health challenge with significant medical, social, and economic impacts. Its spread is driven by urbanisation, climate change, and the adaptability of mosquito vectors. While no specific cure exists, timely clinical care can prevent deaths, and effective prevention strategies can significantly reduce transmission.
The World Health Organization emphasises that dengue control depends on a combination of personal protection, environmental management, community participation, and strong public health systems. As the disease continues to expand geographically, sustained global commitment is essential to reduce its burden and protect vulnerable populations.
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