Across
- 5. in temperature caused by gases in the atmosphere
- 6. layer of air high above the Earth, which contains a lot of ozone
- 8. people who love the natural world and take care of it
Down
- 1. when waste, chemicals, or other particles cause a body of water (i.e. rivers, oceans, lakes) to become harmful to the fish and animals that need the water to survive
- 2. gradual increase in world temperatures caused by polluting gases
- 3. process of conserving energy
- 4. cutting down of trees in a large area; the destruction of forests by people
- 7. when unwanted chemicals, gasses, and particles enter the air causing harm to animals and damaging the natural cycles of the Earth