Some Canadian lakes still store DDT in their mud

Sediment samples show the dangerous pesticide and its by-products have a long life

Sinclair Lake

PERSISTENT POLLUTION  The insecticide DDT, sprayed across North American forests 50 years ago, still lingers in the sediments of some lakes, such as Sinclair Lake in New Brunswick, Canada (pictured). 

J. Kurek

Five decades after DDT was last sprayed across Canadian forests, this harmful pesticide can still be found at the bottom of several lakes.