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billions of gallons of oil and tons of coal has been extracted from the earths crust which is obviously leaving an emptyness behind, i find it hard it hard to believe that this space remains empty without any collapse in the crust to fill the empty space. if there was a collapse in the earths crust then it would surely be felt as an earthquake or maybe even a tsunami.
Earth is only a few kilometers thickness but crude oil pockets could lie anywhere, even under the sea.The crust has to be bored and plugged up for extraction which causes spillage and harms bio life to upset the ecology.

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7y ago

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