Complete the sentences about ecology, using the comma where necessary.

1 ... if we use filters.

2 ... if we don, t dump waste into rivers.

3. If children take care of animals ...

4 ... if people don, t destroy their habitats.

5. When I come to the country ...

6. They will see many species of mammals when ...

1. The air will be pure if we use filters.

2. The water will be clear if we don't dump waste into rivers.

3. If children take care of animals, they will live longer.

4. Humanity will exist if people don't destroy their habitats.

5. When I come to the country, I will use solar batteries.

6. They will see many species of mammals when they visit our reservation park.