Beijing and other cities have tried to improve air quality by switching power plants from coal to natural gas and rolling out fleets of electric buses and taxis.
北京和其他城市尝试通过将发电厂由燃煤型转换到天然气燃烧以及推出电动公交和出租车的方式改善空气质量。
Draw a flow chart to show how switching on electric lights and air conditioners enhances global warming.
画流程图，说明开灯照明和空调等增进全球变暖。
Draw a flow chart to show how switching on electric lights and air conditioners enhances global warming.
画流程图，说明开灯照明和空调等增进全球变暖。
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