Across
- 2. when people purposely clear trees (forested land)
- 4. example of a nonrenewable resource
- 6. The introduction of harmful materials into the environment.
- 7. Recognized on April 22nd every year
- 8. activist who helped promote Earth Day
- 9. contamination of the indoor or outdoor environment
Down
- 1. author of the book called Silent Spring
- 3. when there are more people than can live on the Earth in comfort
- 5. Resources once they are gone, they can’t be replaced