Even as we humans count on forests to soak up a good share of the carbon dioxide we produce, we are threatening their ability to do so.
即使我们指望森林吸收很大一部分人类生产的二氧化碳，但森林的吸收能力正在遭受人类的威胁。
But critics say that "clean coal" is a pipe dream, an oxymoron in terms of the carbon emissions that count most toward climate change.
然而批评者说，“清洁煤”只是一种幻想，由于二氧化碳的排放是引起气候变化的关键，因此“清洁煤”是一个自相矛盾的概念。
So overall (and with the huge proviso that you do not count the fossil fuel used to farm the stuff) biofuels are carbon-neutral.
因此，总体来讲，生物燃料是属于碳中性的，但条件是人们不会去计算制造生物燃料所要耗费的化石燃料。
Even though DMFCs produce carbon dioxide, the amount is small enough for the cells to count as a much greener technology than batteries.
尽管DMFC产生二氧化碳，其量也是非常小的，足以使人将DMFC看作一种比传统电池环保得多的技术。
If you look at production, you count the carbon that comes from a territory's smokestacks, exhaust pipes and forest fires.
如果重视生产，你要核算的碳来自领土内的烟囱、排气管和森林火灾。
If you look at production, you count the carbon that comes from a territory's smokestacks, exhaust pipes and forest fires.
如果重视生产，你要核算的碳来自领土内的烟囱、排气管和森林火灾。
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