Growth of the Alberta tar sands from 1984 to 2011

NASA has posted a series of satellite photos documenting the expansion of the Athabasca tar sands. The Athabasca pits cover over 54,000 square miles in Alberta with an estimated reserve of 1.75 trillion barrels of oil – good enough for third in the world behind Saudi Arabia (1) and Venezuela (2).

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Growth of the Alberta tar sands from 1984 to 2011