No, the Amazon does not contribute 20% of the world's oxygen supply. "the net contribution of the Amazon ECOSYSTEM (not just the plants alone) to the world's oxygen is effectively zero." http://bit.ly/2Zrg3cW
No, the Amazon does not contribute 20% of the world's oxygen supply.
"the net contribution of the Amazon ECOSYSTEM (not just the plants alone) to the world's oxygen is effectively zero."
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