Across
- 2. Result of human activities
- 4. A greenhouse gaz
- 7. Increase with climate change
- 9. More frequent with global warming
- 10. The biggest problem in the oceans
Down
- 1. Bad energy sources for the Earth(2 words)
- 3. In excess it is dangerous for the planet (2 words)
- 5. gas that forms part of the earth's protective layer in the atmosphere
- 6. Processus to cut trees and it increases the quantity of C02 in the atmosphere
- 8. Alternative of fossil fuels