Himalayan ice shows chemicals ban is working

A unique study of frozen ice cores from the Tibetan Himalayas has shown that international agreements on phasing out the use of toxic persistent organic pollutants are working. "Chemical residues are carried thousands of miles on the prevailing winds and deposited in the ice. Ice cores are very effective barometers of pollution over time as ice is laid down over the decades," authors explain.



from News -- ScienceDaily http://ift.tt/1Aru7nb via Karis World