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The world is in danger.
Task 1: Make the match. (let student read the article carefully and try to get the main idea of each paragraph)
Para.1 Bad habits cause pollution.
Para.2 Our world is in danger.
Para.3 We should be green consumers.
Para.4 Cutting down trees cause many problems.
Para.5 The atmosphere around Earth is important.
The world is in danger
Our world is in danger. We must do something to protect the environment. But, what are the main problems we face?
The greenhouse effect
The atmosphere around the Earth is necessary for all living things. It is like the glass of a greenhouse, letting sunlight in and keeping heat from getting out. Without it, the Earth would be the same as the Moon—cold and lifeless.
When we burn fuels such as petrol and coal, we produce a gas called carbon dioxide (CO2). Too much of this gas pollutes the atmosphere, and causes it to keep in too much heat. As a result of the greenhouse effect, the Earth’s temperature is increasing. This causes sea level to rise, and in the future may cause cities to disappear.
Task 2: Read the first part and make the following sentences into correct order.
Task 2: Read the first part and make the following sentences into correct order.
( )Too much CO?pollutes the atmosphere.
( )The atmosphere does not let the heat out.
( )The atmosphere lets the sunlight in.
( )The atmosphere keeps in too much heat.
( )The sunlight reaches the atmosphere of the Earth.
( )The greenhouse effect takes place---the Earth's temperature increases.
( )People burn fuels such as petrol and coal and produce a lot of CO?.
1
2
7
3
5
4
6
Cutting down forests
Every year, we destroy nature by cutting down huge areas of forests. This makes the greenhouse effect worse because trees take in CO2 and produce oxygen. Cutting down trees also destroys the homes of the animals that live in our forests, and causes the surface of the soil to be easily destroyed by rain. This can result in floods and even more damage to the environment.