综合文案介绍unit 2topic 2 all these problems are very serious 1.pdf

In our daily life, we should face more environmental problems. Can you say something about them? cities, pollute, health problems In our daily life, we should face more environmental problems. Can you say something about them? 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, e 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 rease 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” What other kinds of environmental problems can you think of? Talk about them with your classmates. Can you match them? traffic pollution factory pollution more carbon dioxide the ozone layer fewer trees All these problems are very serious. What can we do to solve them? 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 onl