Across
- 4. organisms used as fuel to produce electricity or heat
- 6. to use again
- 7. resources that cannot be replaced
- 10. relating to the nucleus of an atom
- 12. formed by natural processes
- 14. prevention of wasteful use of a resource
Down
- 1. make smaller or less
- 2. produced by the heat of the earth
- 3. resources that can be replaced
- 5. it consists of the bulk movement of air
- 8. make waste materials into new materials
- 9. a substance that is harmful to the environment
- 11. electricity produced from hydro power
- 13. determined by the sun