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lunatica

(53,410 posts)
8. there are 7.68 billion acres of arable land
Sat Apr 27, 2013, 01:41 PM
Apr 2013

the Earth only has 57 million square miles of land (that's 36.48 billion acres; there are 640 acres per square mile).
However, there are only 12 million square miles (7.68 billion acres) of arable land.

http://one-simple-idea.com/Environment1.htm

And people could build these in non-arable land too. But you could have looked it up without much problem too but maybe it's more important to try to stump me.

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