The environment

2. n. something can be consumed to produce energy
6. v. to become larger in amount or number
9. adj. absolutely essential,indispensable
10. n. things such as pieces of paper that people have dropped on the ground in a public place
13. v. to damage something so severely that it no longer exists
14. n. a building with glass walls and roof; for raising plants under controlled conditions
15. n. who buys and uses goods and services
17. n. the degree of hotness or coldness of a body or environment
19. n. a pattern of behavior acquired through repetition
21. n. the state of being polluted

1. n. the air surrounding the earth
3. adj. relating to the natural world
4. v. to change waste materials so that they can be used again
5. n. a gas in the air that has no smell or taste, and that all animals depend on to breathe
7. n. the world including all living things as well as the land and the oceans
8. v. make...happen
11. n. a change appeared as a direct result of an action
12. v. keep...from danger or damage
16. n. something that is made to be sold
18. adj. appropriate for the purpose or situation
20. n. the process of doing something, especially in order to stop a bad situation from developing