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。
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。
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。
Producing that amount of food could significantly increase levels of carbon dioxide and nitrogen in the environment and cause the extinction of numerous species.
生产如此数量的粮食可能大大提高环境中二氧化碳和氮的水平，引起很多物种的灭绝。
But producing the steam means burning natural gas, which emits carbon dioxide.
但是，要生产蒸汽就要燃烧天然气，这还是会产生二氧化碳。
Coal is the dirtiest of fossil fuels, producing twice the carbon dioxide that natural gas does when it is burned. That makes it a big cause of global warming.
煤炭是最污秽的化石燃料，燃烧时会比天然气多产生两倍的二氧化碳，成为全球暖化的主因之一。
Hoegh-Guldberg said oceans were the Earth's "heart and lungs", producing half of the world's oxygen and absorbing 30 percent of man-made carbon dioxide.
豪厄格-古尔·伯格说海洋是地球的“心和肺”，释放出世界上一半的氧气，吸收30%人类制造的二氧化碳。
Methane-producing archaea (methanogens) are a type of chemolithotroph that can use carbon dioxide and hydrogen to make methane without ever seeing the sun.
产甲烷古菌（methanogens）是一种化能自养生物，它能利用二氧化碳和氢合成甲烷，而不需要太阳参与。
All the wasted food ends up in landfills, decomposing without air and producing methane, which is 20 times more potent than carbon dioxide in trapping heat.
所有过期的食物最后被送到了垃圾填埋场，无氧分解以生产出甲烷。甲烷的保温性能要比二氧化碳强20倍。
And producing hydrogen from natural gas creates a lot of carbon dioxide-about double what a small, petrol-based car emits.
同时从天然气中提取氢燃料会制造出很多二氧化碳，相当于小型燃油车辆排放量的两倍。
Coal is one of the dirtiest fossil fuels, producing more carbon dioxide than alternatives such as gas.
煤炭是产生污染最大的化石燃料之一，产生的二氧化碳比天然气等其它燃料更多。
This paper summarized the research developments of carbon dioxide and introduced three main chemic methods of utilizing carbon dioxide, especially the method of producing synthesis gas catalyzer.
概述了二氧化碳利用的研究动态，介绍了二氧化碳与水催化转化制合成气的方法。
Hydrogen-powered cars emit no carbon dioxide, but producing hydrogen requires energy, and if that energy comes from coal-fired power plants, then the problem has not been solved.
氢气动力汽车不排放任何二氧化碳，但是制造氢气需要能量，且如果能量来源于火力发电厂，那么问题还是不能得到解决。
Well, that's busy eating away at the sugar, producing bubbles of 15 carbon dioxide and that's where the fizz comes from.
嗯，酵母在急剧侵蚀蔗糖，会释放二氧化碳气体，所以会有气泡。
Well, that's busy eating away at the sugar, producing bubbles of 15 carbon dioxide and that's where the fizz comes from.
嗯，酵母在急剧侵蚀蔗糖，会释放二氧化碳气体，所以会有气泡。
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