它们产生的浓烟加剧了全球温室效应，只会使所有的问题变得更加严重。
Global warming, which is fed by their fumes, will make all these problems even worse.
为了遏制地球温室效应的加剧，必须控制大气中CO_2的浓度。
In order to lighten this effect, the concentration of CO_2 in atmosphere must be controlled.
为了遏制地球温室效应的加剧，必须控制大气中CO_2的浓度。
In order to lighten this effect, the concentration of CO_2 in atmosphere must be controlled.
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