СРОЧНО ПОЖАЛУЙСТА
1. The day before yesterday we ... (to invite) to the nature center by our biology teacher.

2. If we...(to go) to the nature center, we (to find out) about endangered animal and plant species.
3. The collecting waste paper company... (to organize) next week.

4. You (to help) save a lot of trees if you ...(recycle) old paper and newspapers.

5. In ancient times air....(not to pollute) as much as nowadays. 6. "Greenpeace"... (to know) all over the world.

7. A lot of plants... (to plant) already in our park.

8. Unfortunately, a lot of rainforests....(to cut) down to make paper for years. 9. I think if my family.... (to turn off) the tap while brushing teeth, a lot of water resources on the Earth.... (to save).
10.Our rivers... (be) clean, if people...(not to throw) rubbish into them.

11. We...(to reduce) the use of natural resources if we ... (to recycle) old and used things?
12. What problem we... (to have) if we... (not to stop) pollute oceans, seas, rivers?

13. The forests.... (to cut) down in your country?
14. The air.... (to pollute) in your town by factories?