Adelie Penguins of the Western Antarctic ice shelf.

Scientist believe  as the temperature rises in Antarctica, the melting ice releases DDT trapped since it was carried there in past decades by global air currents and fell with the snow to become trapped in the glacial ice.

In a study, Heidi Geisz and her colleagues found that up to 4 kilograms of DDT are released from the Western Antarctic ice sheet annually.   They suspect this may explain why the DDT levels in Adelie penguins has not dropped over the years despite an 80% reduction in global use.

Their report suggests an increase of almost 5 degrees Celsius in the average winter temperature in the area has resulted in the melt off.

Sourced from Science Daily