As is vividly revealed in the drawing above, a bear and a penguin are forced to hug each other on one of the last pieces of ice-lands left due to global warming caused by carbon emission.

全文翻译正如上面图画所生动地揭示，一只熊和一只企鹅被迫在剩下的最后一块冰地上相拥。这是由于碳排放所导致的全球变暖所造成的。

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During the forced aeration composting with swine manure and bran, the characteristics of nitrogen transformation and NH3 emission are studied.

研究在猪粪、米糠强制通风堆肥过程中，堆体中氮素转化特点和NH3挥发规律。

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To comply with these regulations, automakers are being forced to develop ultra low-emission engine systems by optimizing combinations of technologies related to combustion, aftertreatment and fuel.

为了满足这些排放法规，汽车制造商不得不优化相关的燃烧、后处理和燃料等技术，从而开发超低排放发动机系统。

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Talk of global warming or forced emission cuts, doesn't go down well here.

BBC: Climate chaos: Transcript

But a change in the European Union's emission standards has forced European carmakers to produce diesels that are now even cleaner than California requires.

ECONOMIST: Behind Detroit's sudden embrace of ethanol