Across
- 3. energy released from atomic reactions
- 6. resources that are constantly being replaced
- 9. gray-brown haze produced by chemicals
- 10. energy generated from the movement of wind/air
- 11. snow sleet or rain that has a high acid content
- 12. resources that are used up faster than they can be replaced
Down
- 1. energy from living organisms of their waste
- 2. fuels formed from dead plants and animals
- 4. energy from the sun
- 5. heat from within the Earth
- 7. materials on Earth that are available for our use
- 8. electricity generated from the movement of water