NEWS: Alberta lakes show chemical effects of oilsands
A new study released today suggests chemicals from 50 years of oilsands production are showing up in increasing amounts in lakes in northern Alberta. And the effects are being felt much farther away than previously thought. The joint study between scientists at Queen's University in Kingston, Ont., and Environment Canada looked at core samples from five lakes close to the oilsands mining and upgrading operations in Fort McMurray, Alta. They also studied samples from Namur Lake, 90 kilometres northwest. The study found that the levels of cancer-causing PAHs in all six lakes had increased anywhere from 2½ times to 23 times background levels in the early 1960s, before the start of oilsands mining in the region. The PAHs fall into the water from air pollution and are deposited in the mud over time. One of the study's authors, biologist John Smol from Queen's University, says these formerly pristine northern lakes now have the same chemical composition as lakes near urban areas. / Read more in CBC.ca article by Margo McDiarmid /














