Global organochlorine bans urged to protect polar ecosystems

Scientists studying the environmental fate of organochlorine compounds believe that many may have to be banned because of their accumulation in polar ecosystems. They have concluded that the evidence supports the theory of global distillation, which predicts that volatile compounds will evaporate from tropical or temperate areas and condense at the poles.

It has been known for over 20 years that organochlorines such as PCBs and the pesticides lindane and DDT occur in Arctic and Antarctic ecosystems. How they reached regions far from their agricultural or industrial sources remains unclear, but the scientific community is showing increasing interest in the theory of global distillation or fractionation.

In a recent paper, University of Toronto scientists reviewed the data on levels and tren

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