3.Complete the table with the appropriate word-formations.

Verb	Noun	Adjective
Reduce	-	reductive
-	distribution	distributable
Radiate	radiation	-
Compress	-	-
-	continuation	-

4. Give the Russian equivalents to the words and set expressions.

1. compared to

2. to hold in check

3. to move in a cyclic manner

4. to be a matter of controversy

5. to be of particular interest

6. to be known for sure

7. to escape into space

Compose your own sentences with two of the expressions.

5. Translate from Russian into English.

Падающая радиация, поглощать, ловить, вышедший из-под контроля процесс, быть ответственным за, рассеивать радиацию, влиять (2 вар.), представлять особый интерес, внесение удобрений в почву, сброс сточных вод, значительное истощение (уменьшение), повышать температуру (2 вар.), сжигание, улетучиваться в космос, вредное воздействие, также как и, оценивать, излучение газов парникового эффекта, антропогенное происхождение, природное топливо, большое возмущение.

6. Fill in each gap with only one word.

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 vehicle. When the gases are released, they have two deleterious effects. 4). …, some of the gases are caught by rain clouds and fall as acid rain, 5). … damages the environment. Secondly, if the amount of carbon dioxide increases, a larger fraction of the incident solar radiation is trapped, keeping the heat of the sun close 6). … the Earth’s surface just 7). …. a greenhouse keeps heat in. The increase of carbon dioxide is 8). … worse by the cutting down 9). …. forests. Trees use carbon dioxide, and the fewer trees 10). …, the more of this gas remains 11). … the air. The USA is now leading an international effort to limit deforestation. In 1996, Washington set goals 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.

7. Match the definitions.

1). greenhouse effect	is	a).the radiation emitted spontaneously during the short period of time
2). perturbation		b). a gradual rise in temperature of the earth’s atmosphere, caused by an increase of gases, e.g. carbon dioxide, in the air that trap the warmth of the sun
3). depletion		c). the state or moment of being disturbed
4). incident radiation		d). reduction greatly of the quality, size, power or value of smth.
5) lithosphere		e). a layer between the lithosphere and the atmosphere including all water recourses on the Earth.
6) hydrosphere		f). an upper solid layer of the Earth including crust and the upper mantle