The environment

4. n. who buys and uses goods and services
6. n. the degree of hotness or coldness of a body or environment
8. n. the air surrounding the earth
9. v. make...happen
12. n. a pattern of behavior acquired through repetition
13. n. something can be consumed to produce energy
14. n. the process of doing something, especially in order to stop a bad situation from developing
16. v. to damage something so severely that it no longer exists
17. n. things such as pieces of paper that people have dropped on the ground in a public place
18. adj. relating to the natural world
19. v. keep...from danger or damage
20. v. to become larger in amount or number
21. adj. absolutely essential,indispensable

1. n. a gas in the air that has no smell or taste, and that all animals depend on to breathe
2. v. to change waste materials so that they can be used again
3. n. a change appeared as a direct result of an action
5. n. a building with glass walls and roof; for raising plants under controlled conditions
7. n. something that is made to be sold
10. n. the world including all living things as well as the land and the oceans
11. n. the state of being polluted
15. adj. appropriate for the purpose or situation