• How long does paper take to break down?

• Why do people recycle aluminium?

• How long does it take for metals to break down?

• Is food waste easy to recycle?

• What is the best way of recycling food waste?

• Why is plastic difficult to recycle?

Fill in the gaps with one of the words from the list below.

throw, natural, recycled, compost heap, rain, waste, protect, industry, recycling, fertilizer

As inhabitants of this earth, we all have a duty to the environment. Together we can save endangered species and the forests. We should contribute to environmental protection by finding new ways of using products we away.

Nowadays recycling is an . As the world's resources run out, manufactures must find ways of reusing products. For example, old tires can be melted down and reshaped.

What we can do to help our environment? We can sort our by separating it and then taking it to the appropriate bins. We can reuse things as jars and envelopes. We can buy products like stationery. We can transform our waste food into a which we may use as for our gardens later.

Role-play the following situation:

Student A: You're a busy housewife. You are worried about a large amount of paper that is piling up in your hall. There are old newspapers, advertisement leaflets that you receive by mail and never actually read, etc. You feel it's probably not correct to throw them away but you also don't want to keep themat home any more. Discuss the problem with your neighbour.

Student B: You are a housewife. Your neighbour tells you about the problem she is having with all the unnecessary paper she has in her house. You receive advertisement leaflets and newspapers, too, but you don't keep them in your home. You collect them and then sell them to the paper factory. You are convinced that it's irrational to throw paper and other reusable stuff away. It should be recycled and used again. Tell your neighbour about your views and help her solve the paper problem.

Ex. 3 Read the article and say how the greenhouse effect operates and what effects it has.

As long the 1960s Professor Bert Bolin predicted that the "global warming" caused by an increase in the amount of carbon dioxide (CO₂) in the atmosphere, would lead to significant changes in the earth's climate.

But how does the Greenhouse Effect operate and why such a tiny proportion of CO₂ have such a harmful effect? When living creatures breathe out and when things are burned, CO₂ enters the atmosphere. Until recently all of this was absorbed by trees and plants, which converted it back into oxygen. But the balance of nature has been disturbed. In power stations, in factories and in cars we are burning more and more fossil fuels (coal, oil, natural gas). 18 billion tons of CO₂ enter the atmosphere every year. And the destruction of forests means that there are fewer trees to convert the CO₂ into oxygen. As sunlight enters the atmosphere, the surface of the earth is warmed. Some of this heat escapes back into space, but the rest is trapped by CO₂, which acts rather like the glass in a greenhouse, allowing sunshine and heat to pass in but not out again. Consequently, the temperature rises.