Across
- 4. amount of carbon dioxide produced by a person or company’s activity
- 7. place where people, plants, and animals live
- 8. use materials again
Down
- 1. a special panel which converts sunlight into electricity
- 2. able to continue over a period of time and not harmful to the environment
- 3. the gradual warming of the Earth due to pollution and gases
- 5. gas that is sent out to the air
- 6. large constructions which convert wind into energy