1. If we plant more trees, the neighbourhood will be greener.

2. If we cycle to school everyday, we will keep the air clean and fresh.

3. If we keep hunt animals, they will disappear soon.

4. If we cut down all trees, there will be floods.

5. If we use buses, we will reduce pollution.

6. If he study harder, he will get good marks.

7. If people burn rubbish, they will produce harmful smoke.

8. She will go to the party if you invite her.

9.  If the river polluted, the fish will die.

10. If people cycle more, there will be less polution.