Write the correct form of the verbs in the box. 

be       change       have       help       increase

protect       stop       take       care       understand       use

1. If you ___________ using plastic bags for your shopping, you ___________ the environment.

2. The climate ___________ more if temperatures ___________.

3. If more people ___________ transportation, there ___________ less traffic in the city.

4. Our children ___________ a better future if we ___________ of the planet now.

5. lf our children ___________ conversation, they ___________ nature for the future.