Environment 2

5. the act or result of cutting down or burning all the trees in an area
7. a person who works to protect the natural world from pollution and other threats
9. the gradual destruction of something by natural forces (such as water, wind, or ice)
10. used to describe a type of animal or plant that has become very rare and that could die out completely
11. the conditions that surround someone or something
12. something that makes a place or a substance (such as water, air, or food) no longer suitable for use

1. made to be used once or only a few times : made to be thrown away after one use or several uses
2. the quality or state of having many different forms, types, ideas, etc.
3. to make (something) dangerous, dirty, or impure by adding something harmful or undesirable to it
4. the act of producing or sending out something (such as energy or gas) from a source
6. everything that exists in a particular environment
7. a science that deals with the relationships between groups of living things and their environments
8. the physical or mental strength that allows you to do things