Across
- 2. a gas that is produced when people and animals breathe
- 3. the situation that results when species die
- 4. strength that allows you to do things
- 5. a mass of gases that surround a planet or star
- 8. a region with particular weather patterns or conditions
- 9. the act or result of cutting down or burning all the trees
- 10. the gradual destruction of something by natural forces
Down
- 1. adding something harmful environment
- 2. the protection of animals, plants, and natural resources
- 6. the act of producing or sending out something
- 7. black or brownish-black hard substance within the earth that is used as a fuel