1. Factories dump waste into rivers. A lot of fish die.

If

2. People use plastic bags. Oceans are full of plastic garbage.

If

3. I don't walk to school. I don't save a lot of money.

I will

4. People build too many houses. Land for farming decreases.

àLand for farming 

5. The Earth becomes hotter. The polar ice cap melts.

If

6. The polar ice cap melts. Sea level rises.

If

7. We don't use recycled products. We don't help the environment.

We

8. We breathe polluted air. We suffer from lung diseases.

 If

9. People don't often cycle. There is much air pollution.

There

10. You don't write on both sides. You waste your paper.

You