Across
- 2. removal of trees/forests
- 5. Long-term change in temps on earth
- 6. make smart purchasing decisions
- 8. use of resources
- 9. usage of natural resources that results in depletion
- 10. The sum of different forms of life
- 11. harmful substance contaminating environment
- 12. find ways to use multiple times
- 15. amount of energy ultilized
- 16. a way of farming and fishing producing food without harming environments
- 18. more organisms than ecosystems support
- 19. all biotic/abiotic interactions in a region
Down
- 1. alien species brought by humans
- 3. Changes caused by human activity, which disrupts ecosystems and threatens a species survival
- 4. all organisms in a ecosystem
- 7. caused by ind. rev.
- 13. everything surrounding systems
- 14. properly disposing used resources
- 17. Cultivating soil, producing crops, raising livestock