Environment 2

4. everything that exists in a particular environment
7. a person who works to protect the natural world from pollution and other threats
8. no longer existing
9. the gradual destruction of something by natural forces (such as water, wind, or ice)
10. the conditions that surround someone or something
11. something that makes a place or a substance (such as water, air, or food) no longer suitable for use
14. the quality or state of having many different forms, types, ideas, etc.
15. a science that deals with the relationships between groups of living things and their environments
16. made to be used once or only a few times : made to be thrown away after one use or several uses
17. used to describe a type of animal or plant that has become very rare and that could die out completely

1. the act of producing or sending out something (such as energy or gas) from a source
2. the act or result of cutting down or burning all the trees in an area
3. of, relating to, or using the natural heat produced inside the Earth
5. to make (something) dangerous, dirty, or impure by adding something harmful or undesirable to it
6. the state or situation that results when something (such as a plant or animal species) has died out completely
12. a material (such as coal, oil, or gas) that is burned to produce heat or power
13. something (such as a leaf, skeleton, or footprint) that is from a plant or animal which lived in ancient times and that you can see in some rocks
18. the physical or mental strength that allows you to do things