Across
- 5. Prevention of wasteful use of a resource.
- 7. A sum total of all the living and non-living elements.
- 8. To decay naturally and in a way that is not harmful
- 9. Is a broad term that includes any form of precipitation.
- 10. Air pollution that reduces visibility.
Down
- 1. A poisonous form of oxygen
- 2. Energy that does not come from fossil fuels
- 3. Water, air, or land means to make it dirty and dangerous to live in or to use.
- 4. Made from decomposing plants and animal
- 6. The action or process of converting waste into reusable material.