The development of "oil shale" (not to be confused with "shale oil") and "tar sands" has been shown to be environmentally destructive, and water and energy intensive. Extracting oil from U.S. public ...
Canada’s tar sands are the fourth-largest oil deposit in the world, but separating the bitumen creates large volumes of toxic wastewater, which is stored in tailings ponds that now cover 270 km² (104 ...
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