Nature and the environment

You can ..... plastic bags again and again.

If we don't protect ......,they will disappear forever.

We should care about the....

We won't have enough ......if we waste it.

.....are groups of plants or animals that are in danger of becoming extinct.

Every person produces 650 tons of .....during his/ her lifetime.

If we only (use) the water we need, we ( contribute) to our planet's recovery.

We (save) thousands of trees if we ( stop) wasting so much paper.

If we ( recycle) , we ( help) our planet.

If we (pollute) water, we ( do) harm to the environment.

Our streets ( be) clean, if we ( not litter).

Animals ( not be) in danger if we ( not cut) down the trees.