Ex. 8.10. Complete the sentences using one of the words in the box:

 

 

1) The world in which we live is our ________.

2) ________ is the science which studies the relationship between different life forms in nature.

3) Smoke, dirt and noise are all types of ________.

4) If man continues to hunt Ussuri tigers, they can become ________.

5) In many parts of the world lakes, trees and rainforests are being destroyed by ________ rains.

6) It is necessary that ________ of hazardous chemicals in the sea should be stopped.

7) Many countries have run out of space for disposal of nuclear ________.

8) When the nuclear ________ exploded at the Chernobyl power plant, large areas of the surrounding countryside were ________ and there was ________ all over Europe and even in Brazil.