Across
- 1. group of wind turbines to produce electricity
- 4. harmful substances in the environment
- 6. abnormally low rainfall
- 8. amount of carbon dioxide in the atmosphere
- 10. radiant energy emitted by the sun
Down
- 2. overflow of large amount of water
- 3. clearing wide area of trees
- 5. natural fuel such as coal or gas
- 7. a gas that causes the greenhouse effect
- 9. convert waste into reusable material