Study finds little environmental impact from Canadian oil sands: The ‘toxins well downstream of the oil sands come from the environment, not big steel stacks…’

‘When scientists drilled into lake bottoms 200 kilometres from those oil-sands mines, they discovered something surprising: At that distance, levels of those pollutants were negligible. In fact, the lake sediments, whose layers opened a window onto hundreds of years of air and water quality, showed that in many ways those lakes are cleaner today than they were decades, and even centuries, ago.’