Across
- 3. the process of reusing waste materials to make new products
- 5. a natural material that exists in limited supply
- 9. any method, tool or machine made by humans
Down
- 1. any single living thing
- 2. when the environment becomes contaminated and unsafe for plants, animals and humans
- 3. trash, garbage or waste
- 4. the protection and sensible use of Earth's natural resources
- 6. a resource that can easily be replaced
- 7. relates to life and living organisms
- 8. valuable materials derived from nature