The environment

4. *Unused or discarded material, substances, or by-products.*
8. *Grow or cause to grow and become more mature, advanced, or elaborate.*
9. *A large area covered chiefly with trees and undergrowth.*
15. *Waste material; refuse or litter.*
16. *The presence in or introduction into the environment of contaminants.*
18. *Make smaller or less in amount, degree, or size.*
19. *The natural home or environment of an animal, plant, or other organism.*
20. *The strength and vitality required for sustained physical or mental activity

1. *Contaminate (air, water, or soil) with harmful substances.*
2. *A colorless, transparent, odorless, and nearly tasteless chemical substance.*
3. *Create or manufacture (something), typically a physical product or a result.*
5. *The invisible gaseous substance surrounding the earth.*
6. *Any nutritious substance that people or animals eat or drink.*
7. *Energy produced by mechanical, electrical, or other means to perform work.*
8. *Cause severe damage or ruin something completely.*
10. *A current medium of exchange in the form of coins and banknotes.*
11. *Waste material; refuse or litter.*
12. *Dispose of (rubbish, waste, or unwanted material) in a careless or indiscriminate way.*
13. Have enough money to pay for; be able to do something without financial strain.*
14. *A prolonged period of abnormally low rainfall; a shortage of water.*
17. *A synthetic material made from a wide range of organic polymers.*