ENVIRONMENT

7. These rise when the poles melt.
8. Capable of being maintained over the long term without harming the environment.
9. Air __ can make it difficult to breath.
13. To put used objects or materials through a special process so that they can be used again.
14. Chemicals used to kill insects or other pests that harm crops.
15. Energy derived from natural resources that are replenished naturally.
17. The place where a species lives.
18. When the last animal of a species dies, it becomes...
20. To get rid of something that is no longer needed or wanted.
21. Increase in the average temperature of the earth.

1. This is one of the most polluting materials.
2. Something you can use only use once.
3. Unwanted materials, often discarded.
4. this happens when many trees are cut down.
5. A place where waste is buried under the ground.
6. Large amounts of water covering an area that is usually dry.
10. any substance that can produce energy or heat when burned.
11. Animals or plants that have very few of their kind left.
12. He took part in a human rights ____ against the President's visit.
16. We can ____ The environment by adopting sustainable practices in our daily life.
19. The total amount of greenhouse gases emitted by a person, organization, etc.