Across
- 2. to help or assist
- 7. to decrease an amount
- 10. materials from the environment
- 12. making or manufacture of an item or material
- 15. biotic surroundings
Down
- 1. the way someone lives
- 3. to use a material again
- 4. something (eg plastic) introduced to the environment that has a harmful effect
- 5. to eat or induce something
- 6. decaying organic matter used for fertilizing
- 8. heat energy is a form of ______
- 9. to fail to use materials, not put to good use
- 11. in the environment trees and animals are part of it
- 13. when you need something it is a _____
- 14. affect on something