Across
- 2. energy generated by flowing water
- 4. energy derived from natural sources
- 6. preserves the world's __ resources
- 7. energy released from sources that do not release air pollutants
Down
- 1. clean energy reduses the risk of __ disasters
- 3. energy used for heating and lighting buildings using panels
- 5. power generated from sources that are constantly being replenished