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Fertilisers and Chronic Kidney Disease: Truth

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I have heard the Minister of Agriculture, speaking in Parliament, defending the ban on importing inorganic fertilisers, say that fertilisers are one of the causes of the increased incidence of Chronic Kidney Disease (CKDu), reported mainly in the North Central Province.

Cadmium, which is nephrotoxic, is found in Eppawala Apatite (rock phosphate- EP). Rock phosphate is used to manufacture phosphate fertilisers such as Triple Super Phosphate (TSP).

Although EP, and TSP contain cadmium, it is present in insoluble complex forms. When these phosphatic fertilizers are applied to soils, only a very small percentage of cadmium, in the fertiliser gets into water as cadmium ion (Cd ++). The balanced cadmium is not easily available and remains as an insoluble complex. Hence, Cd is not available for plants to be absorbed. A number of soil factors, such as soil pH, determine Cd availability. TSP is used as a fertiliser in all agricultural areas in the country including upcountry, but CKDu is reported mainly in the Anuradhapura and Polonnaruwa districts.

The exact cause of the disease is not known. A number of seminars/symposia on CKDu have been held during the last few years. Results of studies carried out by a number of Sri Lankan scientists were presented at these seminars, and CKDu was attributed to a toxic element/s or compound/s in drinking water. However, there is no conclusive evidence on what causes CKDu.

The Ministry of Health, in collaboration with the World Health Organisation, carried out a multidisciplinary research study during 2010-2012. This study, costing nearly Rs. 100 million, was assisted by around 40 Sri Lankan scientists. There was no conclusive evidence from this study as to what causes CKDu. A recent review by the International Water Management Institute (IWMI) (ref. IWMI Working Paper 158) indicates that no specific substance/compound has been proved to cause CKDu.

Some, including the Minister of Agriculture, attribute CKDu to fertilizers. If so, it is not possible to explain why CKDu is not prevalent in many other districts such as Kalutara, Kandy, Nuwara Eliya , Hambantota, etc., where TSP is applied in large amounts. Even in the NCP, the occurrence of CKDu is considerably higher in some DS divisions than in others.

It is very important that those who attribute CKDu to fertilisers, including the Minister of Agriculture, refrain from citing unconfirmed unscientific views/ideas, which tend to give wrong information to the general public and to policymakers.

 

Dr. C. S. WEERARATNA

csweera@sltnet.lk



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Opinion

A harsh reflection of Sri Lanka’s early-warning gap

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Floods caused by Cyclone Ditwah

Cyclone Ditwah:

Cyclone Ditwah, which swept across Sri Lanka at the end of November, caused massive damage to the country, the extent of which need not be mentioned here, as all are aware of it by now. Heated arguments went on among many parties with regard to how this destruction could have been mitigated and who should take responsibility. Although there may have been shortcomings in several aspects of how we responded to Ditwah, this article highlights a critical area that urgently requires attention if we are to protect ourselves from similar hazards in the future.

As is common in many situations, it has once again showcased a concerning weakness in the country’s disaster-management cycle, the gap between issuing early warnings and the expected public response. The Meteorological Department, the Irrigation Department, the National Building Research Organization, and other authorities issued continuous warnings to evacuate well in advance of imminent threats of flooding, landslides, and water hazards. However, the level of preparedness and community reaction fell short, leading to far greater personal property damage, including loss of a few hundred lives.

Sri Lanka is not unfamiliar with natural disasters. One of the most devastating disasters in our history could be considered the 2004 Tsunami event, which resulted in over 35,000 deaths and over $1 billion in property damage in the coastal belt. After the event, the concepts of disaster management were introduced to the country, which we have been adhering to since then. Again in 2016, the country faced massive river flooding, especially in western and southern regions, and until recently experienced repeated floods and landslides due to rains caused by atmospheric disturbances, though less in scale. Each of these events paved the way for relevant authorities to discuss and take appropriate measures on institutional readiness, infrastructure resilience, and public awareness. Yet, Cyclone Ditwah has demonstrated that despite improvements in forecasting and communication, well supported by technological advancements, the translation of warnings into action remains critically weak.

The success of early-warning systems depends on how quickly and effectively the public and relevant institutions respond. In the case of Ditwah, the Department of Meteorology issued warnings several days beforehand, supported by regional cyclone forecasting of neighbouring countries. Other organisations previously mentioned circulated advisories with regard to expected flood risk and possible landslide threats on television, radio, and social media, with continuous updates. All the flood warnings were more than accurate, as low-lying areas were affected by floods with anticipated heights and times. Landslide risks, too, were well-informed for many areas on a larger spatial scale, presumably due to the practical difficulties of identifying such areas on a minor scale, given that micro-topography in hill country is susceptible to localised failures. Hence, the technical side of the early-warning system worked as it should have. However, it is pathetic that the response from the public did not align with the risk communicated in most areas.

In many affected areas, people may have underestimated the severity of the hazard based on their past experiences. In a country where weather hazards are common, some may have treated the warnings as routine messages they hear day by day. As all the warnings do not end up in severe outcomes, some may have disregarded them as futile. In the meantime, there can be yet another segment of the population that did not have adequate knowledge and guidance on what specific actions to take after receiving a warning. This could especially happen if the responsible authorities lack necessary preparedness plans. Whatever the case may be, lapses in response to early warnings magnified the cyclone’s impact.

Enforcing preventive actions by authorities has certain limitations. In some areas, even the police struggled to move people from vulnerable areas owing to community resistance. This could be partly due to a lack of temporary accommodation prepared in advance. In some cases, communities were reluctant to relocate due to concerns over safety, privacy, and the status quo. However, it should be noted that people living in low-lying areas of the Kelani River and Attanagalu Oya had ample time to evacuate with their valuable belongings.

Hazard warnings are technical outputs of various models. For them to be effective, the public must understand them, trust them, and take appropriate action as instructed. This requires continuous community engagement, education, and preparedness training. Sri Lanka must therefore take more actions on community-level disaster preparedness programs. A culture of preparedness is the need of the day, and schools, religious institutions, and community-based organisations can play an important role in making it a reality. Risk communication must be further simplified so that people can easily understand what they should do at different alert levels.

Cyclone Ditwah has left, giving us a strong message. Even an accurate weather forecast and associated hazard warnings cannot save lives or property unless the public responds appropriately. As it is beyond doubt that climate change intensifies the frequency and severity of extreme weather events, people in Sri Lanka have to consider preparedness as a routine part of life and respond to warnings promptly to mitigate damage from future disasters.

(The writer is a chartered Civil Engineer)

by Eng. Thushara Dissanayake

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Opinion

Feeling sad and blue?

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Rowan Atkinson

Here is what you can do!

Comedy and the ability to have a good laugh are what keep us sane. The good news to announce is that there are many British and American comedy shows posted up and available on the internet.

They will bring a few hours of welcome relief from our present doldrums.

Firstly, and in a class of its own, are the many Benny Hill shows. Benny is a British comedian who comes from a circus family, and was brought up in an atmosphere of circus clowning. Each show is carefully polished and rehearsed to get the comedy across and understood successfully. These clips have the most beautiful stage props and settings with suitable, amusing costumes. This is really good comedy for the mature, older viewer.

Benny Hill has produced shows that are “Master-Class” in quality adult entertainment. All his shows are good.

Then comes the “Not the Nine o’clock news” with Rowan Atkinson and his comedy team producing good entertainment suitable for all.

And then comes the “Two Ronnies” – Ronnie Barker and Ronnie Corbett, with their dry sense of humour and wit. Search and you will find other uplifting shows such as Dave Allen, with his monologues and humour.

All these shows have been broadcast in Britain over the last 50 years and are well worth viewing on the Internet.

Similarly, in The USA of America. There are some really great entertainment shows. And never forget Fats Waller in the film “Stormy Weather,” where he was the pianist in the unforgettable, epic, comedy song “Ain’t Misbehavin”. And then there is “Bewitched” with young and glamorous Samantha Stevens and her mother, Endora who can perform magic. It is amazing entertainment! This show, although from the 1970s was a milestone in US light entertainment, along with many more.

And do not overlook Charlie Chaplin and Laurel and Hardy, and all the Disney films. Donald Duck gives us a great wealth of simple comedy.

The US offers you a mountain of comedy and good humour on Youtube. All these shows await you, just by accessing the Internet! The internet channel, ‘You tube’ itself, comes from America! The Americans reach out to you with good, happy things right into your own living room!

Those few people with the ability to understand English have the key to a great- great storehouse of uplifting humour and entertainment. They are rich indeed!

Priyantha Hettige

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Opinion

There is much to learn

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After the recent disaster, a great deal of information has been circulating on WhatsApp and YouTube regarding our reservoirs, highways, etc.

In many of these discussions, people have analysed what went wrong and how the damage could have been prevented. My question is this: why do all these knowledgeable voices emerge only after disaster strikes? One simple reason may be that our self-proclaimed, all-knowing governing messiahs refuse to listen to anyone outside their circles. It is never too late to learn, but has any government decision-maker read or listened to these suggestions?

When the whole world is offering help to overcome this tragedy, has the government even considered seeking modern forecasting equipment and the essential resources currently not available to our armed forces, police, and disaster-management centres?

B Perera

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