And so, when you think about how much cement concrete are consumed annually on the planet, this becomes a considerable point source of greenhouse gas emissions.
当你想到,在地球上每年要消耗多少的水泥混凝土的时候,这将是温室气体排放的,一个主要来源。
is actually looking at how to regulate greenhouse gases under existing environmental laws,
其职务是研究在现行的环境法下如何管理温室气体的排放,
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