THE GREENHOUSE EFFECT

Gases pollute the atmosphere because they are produced 1)…. Quickly to be cleared away naturally 2) ….. rain, winds or plant life. These poisonous gases 3) ….. from several sources such as oil producers, industries which burn fuel and motor vehicles. When the gases are released, they have two harmful effects. 4) ….., some of the gases are caught by rain clouds and fall as acid rain, 5) ….. damages the environment. Secondly, increasing amounts of carbon dioxide forms a cover over the earth, keeping the heat of the sun close 6) ….. the earth’s surface just 7) ….. a greenhouse keeps heat in. The increase in carbon dioxide is 8) ….. worse by the cutting down 9) ….. forests. Trees use carbon dioxide, and the fewer trees 10) ….. are, the more of this gas remains 11) …..the air. The USA is now leading an international effort to limit deforestation. In 1996, Washington set soals for industry, and several international agreements 12) ….. already been effective in reducing the production 13) ….. harmful gases. Only international cooperation can 14) ….. this problem which, if 15) ….. controlled, may threaten all life on earth.

Fill in the gaps with words derived from the words in brackets.

There are many problems which 1) ….. (threat) our natural environment. Acid rain, 2) ….. (globe) warming and air and water 3) ….. (pollute) are among the most serious ones. There are several ways to help improve the situation. Firstly, we should encourage 4) ….. (recycle) because it is the 5) ….. (produce) of new materials which causes the most damage. We must learn to reuse things like plastic bags and glass jars. Secondly, driving an environmentally-friendly car is also 6) ….. (help). Furthermore, joining an 7) ….. (organize) which plants trees or cleans up beaches would be 8) ….. (prove) that you are really 9) ….. (concern) about the environment. Lastly, supporting groups such as Greenpeace, which try to prevent many 10) ….. (environment) disasters, would help to ensure that our planet will be clean and safe for future generations.

Read the following model about recycling and fill in the topicsentences given below.

1. Many people argue that the actual process of collecting and recycling materials is expensive and unnecessary.
2. To start with, it is very important for people to realize the damage that our rubbish is doing to the environment.
3. Another important reason is that many forests are being destroyed due to paper being wasted.

Date: 2015-04-20; view: 2687