Reducing levels of carbon dioxide in the atmosphere is of critical importance.
减少大气层中的二氧化碳含量极其重要。
Burning fossil fuels releases carbon dioxide into the atmosphere.
燃烧化石燃料会向大气中排放二氧化碳。
All things considered, I think every country should cut the emission of carbon dioxide to protect the earth.
总而言之，每一个国家都应该减少二氧化碳排放量来保护地球。
Last time we talked about photosynthesis, the process by which plants use light to convert carbon dioxide and water into food.
上次我们讨论了光合作用，即植物利用光将二氧化碳和水转化为食物的过程。
In fact, studies indicate that four billion years ago, carbon dioxide levels in the atmosphere were much higher than today's levels.
事实上，研究表明40亿年前大气中的二氧化碳含量远远高于今天的水平。
The technology raises the prospect of Britain becoming self-sufficient in renewable energy and drastically reducing its carbon dioxide emissions.
这项技术提高了英国在可再生能源方面实现自给自足和大幅减少二氧化碳排放的前景。
In Earth's earliest atmosphere, methane and carbon dioxide occurred at much higher levels than at present-a circumstance that was favorable for early life.
在地球最早的大气层中，甲烷和二氧化碳的含量比现在要高得多，这对早期生命来说是有利的。
Volcanic carbon dioxide in Earth's early atmosphere kept Earth warm enough for life to begin during the time when the Sun was too dim to provide much warmth.
地球早期大气中的火山二氧化碳使地球足够温暖，保证生命在太阳过于昏暗而无法提供足够热量的时候能够得以孕育。
When our Sun later became hotter, the continued removal of atmospheric carbon dioxide and methane by early bacteria kept Earth's climate from becoming too hot to sustain life.
当我们的太阳后来温度变得更高时，早期细菌持续清除大气中的二氧化碳和甲烷，使地球的气候不至于变得太热而无法维持生命的存在。
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。
When carbon dioxide dissolves in water it forms carbonic acid.
二氧化碳在水中溶解后会形成碳酸。
A constant flow of air keeps the plants bathed in carbon dioxide.
室内空气保持不停流动，确保作物随时“沐浴”在二氧化碳之中。
"Carbon dioxide: they call it pollution; we call it life," runs the slogan.
广告的口号是：“二氧化碳：他们把它称为污染；我们把它叫做生活。”
Artificial trees could soak up carbon dioxide from the air using a chemical process.
人造树可以通过化学反应吸收二氧化碳。
Photosynthesis by phytoplankton removes carbon dioxide from the air and produces oxygen.
浮游植物通过光合作用消耗空气中的二氧化碳产生氧气。
The MIT team's biological system captures carbon dioxide at a higher rate, says Barbero.
麻省理工学院的研究小组所创造的生物学系统能够更快更高效地捕获二氧化碳，巴贝罗如是说。
Through photosynthesis plants use sunlight to convert water and carbon dioxide into sugar.
植物通过光合作用，利用阳光把水和二氧化碳转化为糖分。
Green plants capture carbon dioxide through photosynthesis and store carbon in their tissues.
绿色植物通过光合作用吸收二氧化碳，并把碳储存在组织内。
He said that UNEP is delighted at the gradual reduction of carbon dioxide emissions in China.
他说，环境规划署高兴地看到中国二氧化碳排放量正在逐年下降。
Some plant trees to soak up carbon dioxide. Others prevent existing trees from being chopped down.
有些组织种植树木吸收二氧化碳，有些则保护现存树木免遭砍伐。
Technology that can trap and store carbon dioxide from coal-fired plants would rejuvenate older ones.
从火电厂捕获和储存二氧化碳的技术可能会令较为老旧的电厂重获新生。
Scientists say a 25 to 40 percent cut in carbon-dioxide emissions is needed to control global warming.
科学家说，要想控制全球气候变暖就必须把二氧化碳的排放量减少25%到40%。
Trees absorb carbon dioxide through their leaves and break it down, releasing oxygen into the air.
树木通过树叶吸收二氧化碳，并使之分解，而后向空气中释放氧气。
Check the ingredient list for zinc oxide or titanium dioxide; both physically block UVA and UVB rays.
注意成分表中是否含有氧化锌或二氧化钛，这两者都能阻挡紫外线A和B。
Activists are pushing a ballot question to restrict the amount of carbon dioxide the power plants can emit.
环保人士正力促将限制发电厂的二氧化碳排放量加入投票议题。
Zhou told a national conference that sulfur dioxide emissions were down 24.6 percent compared with that of 2005.
周生贤在一次全国性会议上指出，二氧化硫的排放量与2005年相比已经下降了24.6%。
Through renewable energy generation, Turkey averts emissions of about 1.01 million tons of carbon dioxide per year.
通过生产可再生能源，土耳其每年可减少约101万吨二氧化碳排放。
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。
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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