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Villain or victim? If policymakers get it wrong, the answer could be both. 是元凶还是受害者？如果政策制定者应对不当，答案可能两者皆是。 Cities in the 21st century are the engines of economic growth and provide employment and homes to the growing global middle classes. 21世纪的城市是经济增长的引擎，并为全球日益壮大的中产阶级提供了就业机会和住房。 As the world gets hotter, however, urban areas will need to put themselves at the heart of the international effort to mitigate the effects of climate change. 但随着全球气候变暖，城市地区必须把自己放在减轻气候变化影响的全球性努力的中心位置。 | 
