Across
- 3. / fossil fuel that is a gas
- 4. overuse, pollution and climate change are causing scarcity of which vital natural resource
- 5. / fossil fuel in form of a rock
- 7. wind energy is
- 8. coal is
- 11. raw material of production
- 12. release of harmful stuff into the environment
- 13. used or waste materials produced to new things
- 14. process of turning raw materials into finished produces
- 15. rocks from minerals
Down
- 1. source of many commodities
- 2. protection and careful use of natural resources so they are not wasted
- 6. the practice of growing crops and live stock
- 9. / fossil fuel that is a liquid
- 10. searching for new natural resources