Across
- 2. All of the land and water that drain into a river system.
- 4. A nonrenewable resource that is used to grow crops
- 7. Energy generated using renewable resources
- 8. A way of conserving resources such as plastic, metal, and glass.
- 9. A nonliving solid with a crystal form
- 10. Natural resources that aren't replaced easily
- 11. A solid substance made of one or more minerals
- 12. Coal, oil, and natural gas
Down
- 1. The use of less of something to make its supply last longer.
- 3. Natural resources that can be replaced quickly
- 5. Materials found in nature that are used by living things to meet their needs
- 6. Harmful materials in the environment