Across
- 4. gas,2 words gases sent into the atomosphere
- 5. quality of not being harmful to the environment or depleting natural resources thereby supporting long-term ecological balance
- 7. footprint,2 words the amount of carbon dioxide because of fossil fuels
Down
- 1. off
- 2. a strong effect
- 3. value
- 6. cycle,2 words the series of changes in life