Letters

Thermocol experiment

The decision to float thermocol on Vaigai dam to prevent evaporation is illogical and unconvincing. It is surprising that such a decision has been taken by a Minister in the State government. On a large river like the Vaigai, such scheme would be impossible to implement even if proven to be technically sound.

While thermocol is thermal resistant, it is slow to biodegrade and will gradually absorb water at the rate of 0.5% for every seven days of exposure in water. It is also brittle. After floating for some time, it may also crumble causing problems. Thermocol is alternately known as an expandable polystyrene. There is controversy and difference of view among scientists about the carcinogenicity of polystyrene. Therefore, it may not be an ecofriendly exercise to float thermocol on water.

N.S. Venkataraman,

Chennai


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Printable version | Sep 21, 2021 1:04:33 PM | https://www.thehindu.com/opinion/letters/thermocol-experiment/article18200601.ece

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