1) it’s a letter.
2)
1. pollution
2. natural habitats
3. endangered species
4. acid rain
5. environment
6. power stations
7. recycling the rubbish
8. the fumes from car
9. the government
10. to destroy
11. to protect
12. to disappear
13. to reduce

3. Грамматика
1) destroys, starts
2) have been learning, has been damaging, has been talking
3) IT (1) pollution
IT (2)the government

4) вопросы
1. It starts with the smoke from power stations and the fumes from car exhausts. The clouds take in the smoke and then it rains down on us.
2. Acid rain has been damaging the environment for years.
3. We can do little things like walking to school instead of taking the bus, recycling our rubbish.
4. We should start recycling things made of glass, paper, plastic and aluminium. We should stop smoking and plant as many trees as we can because they can give us more oxygen, throw garbage in special places, don’t burn bonfires in the forest. Do not wash the car in a pond or pour technical waste into the water;
Feed urban birds in winter; participate in community work days to clean the forested area.