THAILAND The Tha Chin river is slowly recovering from the deluge of black, foul-smelling water which killed thousands of fish. The river's highly polluted state was first noticed by the officials of Suphan Buri towards the end of April. Initially, it was assumed that industrial effluents were causing this severe pollution. But later, the reason for the water turning putrid was traced to the paddy fields.

Nisakorn Kositratna, deputy director-general of the pollution control department, said there was evidence suggesting that the farms were responsible for polluting the river, and not factories. Tests conducted on the putrescent water has revealed that the contamination level of heavy metals

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