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…

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.