译文核能支持者认为核能事故的危害比起全球变暖的危害要小。

Nuclear supporters argue that nuclear system failures are less challenging than global warming.

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在加拿大和澳大利亚全球变暖的危害或许已经显现：一连几个暖冬造成了加拿大树皮甲虫成灾，旱灾和大火也使澳大利亚的森林屡遭破坏。

That may already be happening in Canada, where recent warm winters have unleashed a plague of bark beetles, and in Australia, whose forests have been devastated by drought and forest fires.

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食物生产的高碳排放来自于畜牧业以及大量使用的化肥，其中有些分解成一氧化二氮，而一氧化二氮对全球变暖的危害性比二氧化碳的要高出数百倍。

The high emissions come from livestock farming and from the heavy use of fertilisers, some of which break down into nitrous oxide, a global warming gas hundreds of times more powerful than CO2.

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