[名校联盟]重庆市涪陵九中九年级上册英语《Unit 2 Saving the Earth》课件（4份）

Unit 2 Saving the Earth Topic 2 All these problems are very serious. Section C In our daily life, we should face more environmental problems. Can you say something about them? cities, pollute, health problems factories, the land and the air, dead In our daily life, we should face more environmental problems. Can you say something about them? cut down, millions of, take away the earth, become desert In our daily life, we should face more environmental problems. Can you say something about them? oxygen a special kind of oxygen called “ozone” (O3) a very big hole in the ozone layer, too much harmful radiation from the sun In our daily life, we should face more environmental problems. Can you say something about them? CO2 carbon dioxide increase a lot, form a “blanket”, the heat from the sun can’t escape cause the level of the sea to rise called “the greenhouse effect” or “globe warming” In our daily life, we should face more environmental problems. Can you say something about them? What other kinds of environmental problems can you think of? Talk about them with your classmates. fewer trees factory pollution traffic pollution the ozone layer more carbon dioxide Can you match them? Fewer trees Factory pollution Traffic pollution The ozone layer More carbon dioxide All these problems are very serious. What can we do to solve them? Watch and understand （视频P37-1a） Can you choose a suitable title for each paragraph from the phrases below? The earth is 4 600 million years old. We humans have lived on earth for only 35 000 years, but during this period we have changed our planet a lot in many ways. Some things we’ve done are very good for the earth while some are bad. _________ All over the world, people have cut down millions of trees. When it rains or when the wind blows, the earth is taken away. Forests have become deserts, so more and more sorts of animals and plants are disappearing. Fewer Trees ____________ In big cities, cars and