Across
- 3. To use materials again in order to reduce waste.
- 5. A place where trash is buried underground.
- 7. A type of energy that comes from sunlight.
- 8. A resource that cannot be replenished quickly. (12)
- 9. The natural world, including land, water, air, and living things. (11)
- 10. The cutting down of trees in large areas.
Down
- 1. Harmful substances released into the environment. (9)
- 2. A source of power that doesn't run out, like wind or solar. (9)
- 4. Not artificial; related to the Earth.
- 6. Pollution in the atmosphere caused by gases that trap heat.