大学英语演讲global-warming.ppt

Global Warming 演讲人：*** Main Contents  What is global warming? What can we do to stop global warming? What causes global warming? What is global warming doing to us? What is global warming? Global Warming: Global warming is the increase in the average temperature of the earth’s near-surface air and oceans in recent decades . What is global warming? What causes global warming? What causes global warming? The squiggle lines coming from the sun are visible light and the lines and arrows inside the car are infrared light. What causes global warming? Deforestation Industries emissions Population Growth What is global warming doing to us? Glaciers are melting. the sea is rising What is global warming doing to us? In some areas, the original bountiful land now cracked the mouth, the children do not have water to drink and grains to eat. What can we do to stop global warming? Walk as far as possible or travel by public transport Use energy conservation electric appliance as far as possible What is global warming doing to us? Don’t waste paper Turn off lights when you leave Don’t use plastic bags as far as possible Plant more trees in your leisure hours. and so on.......