translation.en: Cities are the origins of global warming, impact on the environment, health, pollution, disease, finance, economies, energy -- they're all problems that are confronted by having cities.
translation.zh: 城市是全球变暖的源头 影响着环境 卫生 污染 疾病 金融 经济 能源－－ 这些问题 都是由城市引起的