阿伯达省的油砂矿开始于1967年，最早的矿井是上图（1984年）中离阿萨巴斯卡河最近的那个。

Oil sand mining began in Alberta in 1967.That first mine is closest to the Athabasca River in the top image (1984).

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到2011年阿萨·巴斯卡河两岸已是矿坑遍布。

By 2011, pit mines surrounded the Athabasca River.

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到2011年阿萨·巴斯卡河两岸已是矿坑遍布。

By 2011, pit mines surrounded the Athabasca River.

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