他们也倾向于生产劣质煤，这些煤在燃烧时产生相对高的污染水平。

They also tend to produce poor-quality coal which generates relatively high levels of pollution when burned.

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但是在未来数年，不管我们喜不喜欢，大多数电力还是来自于传统以煤为燃料的火电厂，由此产生的温室气体排放的增加在世界范围内是最快的。

But in the coming years, like it or not, most electric vehicles would rely on conventional coal-fired power, which is responsible for the fastest growth in greenhouse-gas emissions worldwide.

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克拉克森是世界首屈一指的船商，他于二十世纪九十年代初率先开发了衍生品——干散货(例如铁、煤)，并且在今年一月进行了首次集装箱衍生品的交易。

Clarksons, the world's biggest shipbroker, which pioneered derivatives for dry-bulk cargoes like iron ore and coal in the early 1990s, made its first container-derivative trade in January this year.

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