Ответ:

I

1. fumes

2. station

3. recycle

4. pollution

5. rain

6. tropical

7. fumes

8. watering

9. rubbish

10. trees

II

1. solar

2. out

3. join

4. live

5. species

6. up

7. habitats

8. up

9. has

10. box

III

1. has been trying

2. has been snowing

3. have been donating

4. have been studying

5. has been planting

IV

1. Americans buy a lot of bottled water every year in the world.

2. Some people prefer bottled water because they think it's healthier for them than tap water.

3. People usually send plastic bottles to landfills.

4. Plastic bottles desintegrate in the earth for hundreds of years.

5. To avoid environmental pollution with plastic bottles, people should recycle  them.