诚然，某些化石燃料可能比其他燃料来的糟糕。 但现今，煤炭问题已然同有毒物质污染及温室气体排放的危害不相上下了。
Of course, some fossil fuels are worse than others, but so far, coal is the worst as far as toxic pollution and GHG emissions.
它们包括锰、一氧化碳等有毒物质，及杀虫剂、除草剂等农用化学品。
These include specific toxins such as manganese and carbon monoxide, and agrochemicals such as pesticides and herbicides.
烟草烟雾中的有毒物质及对有机体的危害是多方面的。
The poisons in the cigarette smoke do harm to the organism in many ways.
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