A) Pay attention to the usage of the Present Indefinite Tense and the Present Continuous Tense.
Date: 2015-10-07; view: 409.
The greenhouse effect
1) A greenhouse
A greenhouse is a building made of glass, where you can grow flowers and other plants that need a lot of warmth.
2) How it works
The sun shines in through the glass and warms the greenhouse and the roof and walls keep the heat from getting out.
3) Our greenhouse
The Earth is surrounded by a blanket of invisible gases (with names like carbon dioxide) that act just like a greenhouse. The sun shines in, and the blanket of gases traps (поглощает) the heat like a roof, keeping it close to the planet. That's good – we can't live without warmth.
4) What's going on
Factories, electric power plants, and cars are making a lot of new gases. Even trees, when they're cut down, give off the gases! These new gases are trapping more and more of the sun's heat. This is called the greenhouse effect, or global warming.
B)Put the verbs into the correct form: the Present Indefinite Tense or the Future Indefinite Tense.
5) What can happen
If the earth's temperature (to get) hotter by just a few degrees, it (to change) the weather all over the planet in big ways. Places that (to be) warm (to become) too hot to live in and places that (to be) cold (to become) warm. The place that (to grow) most of our food (to get) too hot to grow crops anymore.
We (to help) stop the greenhouse effect if we (to use) less energy, (to protect and to plant) trees, and (to recycle) materials.
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