第三节书面表达（满分30分）
话题：全球气候变暖是目前人类面临的最大环境问题，温室气体大量排放，海平面急剧上升，自然灾害频繁。
要求：请写一篇为“节能减排”献计献策的短文。（100字左右）
提示：1. 多使用清洁能源， 2. 以步代车With the development of economy, more and more greenhouse gases are being discharged into the air. CO2 makes up about 70% of the greenhouse gases, which is considered to be one of the greatest causes of global warming. It has harmful effects, causing the sea level to rise and many natural disasters to strike.
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(答案→)With the development of economy, more and more greenhouse gases are being discharged into the air. CO2 makes up about 70% of the greenhouse gases, which is considered to be one of the greatest causes of global warming. It has harmful effects, causing the sea level to rise and many natural disasters to strike.
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