Bacteria chew up carbohydrates in the wastewater, producing carbon dioxide.

细菌消化废水中的碳水化合物，释放出二氧化碳。

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Rainforests are the lungs of the planet storing vast quantities of carbon dioxide and producing a significant amount of the world's oxygen.

雨林是地球之肺，储存了大量的二氧化碳，并为世界生产了大量的氧气。

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The micro-algae thrive on carbon dioxide, producing food for livestock as well as biofuels and material for plastics.

藻类靠吸收二氧化碳来生长，而且可以被当作家畜饲料、生物燃料和制造塑料的原材料。

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Human activities are producing increased amounts of carbon dioxide and other gases.

VOA: special.2010.01.19

Bacteria chew up carbohydrates in the wastewater, producing carbon dioxide.

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Auto engineers and climate scientists say that to understand that, you have to realize that producing carbon dioxide is unavoidable if you want to use a modern engine to power your car.

NPR: Has the Move to Make Cars Greener Stalled?

So given all the things the Sheppards are doing, how much carbon dioxide are they producing?

NPR: North Carolina Family Takes Carbon Challenge