The tiny organisms, known as phytoplankton, also gobble up carbon dioxide to produce half the world's oxygen output-equaling that of trees and plants on land.

这些被称为浮游植物的微生物，吸收二氧化碳产生世界上一半的氧气量——这等于陆地上的植物和树木所产生的氧气量。

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Their scientists know that the only significant effect of increased CO2 in the atmosphere has been to improve global agricultural output, as CO2 is plant food, or oxygen to plants.

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