VII

1, B-Carbon monoxide in the atmosphere.

2, A-ozone damage

3, D-Carbon monoxide is not absorbed so fast.

4, C-They are possibly burning fewer forests in the Southern Hemisphere.

5, B-He is neutral.

VIII

1, Because they were told about the dangers of chemical fertilizers, they turned to bio-fertilizers.

2, Because I spent the whole day cleaning up my room, I needed to take a shower and have a rest.

3, After I had finished all my homework, I watched my favorite film on TV.

4, After I had watched the documentary about wildlife, I made a donation to an environmental society.

5, After we had read the stories about people who reduced their carbon footprint, we started to change our daily consupmtion habits.

6 ,After I had eaten my evening meal, I decided to go for a walk.

7, Since the authorities managed water resources irresponsibly, they had to deal with water shortages in the region.