PROTECTING ENVIRONMENT

4. knowing something; knowing that something exists and is important
7. at risk of no longer existing
8. to become impossible to see
9. to decide or say officially that something is not allowed
10. the place where a particular type of animal or plant is normally found
11. the process of making air, water, soil, etc. dirty; the state of being dirty

1. cutting down or burning the trees in an area
2. the powerful effect that something has on somebody/something
3. to damage something so badly that it no longer exists, works, etc.
4. the mixture of gases that surrounds the earth
5. all living creatures and non-living things in a particular area considered in relation to their physical environment
6. not allowed by the law