Nowadays scientists are finding light pollution can be almost as bad as carbondioxidepollution.
如今科学家们发现光污染几乎和二氧化碳污染一样有害。
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A laborious study of the girth of 70, 000 trees across Africa has shown that tropical forests are soaking up more carbondioxidepollution that anybody realised.
一项费力测量了整个非洲大陆上近7万棵树木周长的研究显示，热带森林吸收的碳排放比我们认识到的要多。
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"Carbondioxide: they call it pollution; we call it life," runs the slogan.