Across
- 1. Average per person
- 3. When two things happen together but one does not cause the other
- 4. A group of organisms with similar characteristics that are able to interbreed or exchange genetic material
- 8. Resources that exist in the environment without human intervention
- 9. The place where an organism naturally lives and grows
- 10. The permanent disappearance of a species from Earth
- 11. the presence in or introduction into the environment of a substance or thing that has harmful effects
- 12. Action of clearing a wide area of trees and destruction of the forest
Down
- 2. The use of resources (e.g., fuels or food) by specific populations
- 5. not being harmful to the environment and not depleting natural resources
- 6. strong effect
- 7. The sum of all living matter on Earth