AdvertisementDeep In Canadian Lakes, Signs Of Tar Sands PollutionJanuary 08, 2013Elizabeth ShogrenfacebookEmailAn aerial view of the Suncor oil sands extraction facility on the banks of the Athabasca River in Alberta, Canada, in 2009. Scientists say contaminants found at the bottom of lakes in Alberta are from air pollutants from the facilities responsible for producing and processing tar sands oil. (AFP/Getty Images)