Across
- 3. Breeding of cows
- 7. We take in oxygen and produce this
- 9. Consists of ozone, carbon dioxide, methane, and nitrous oxide
- 10. They erupt lava and ashes
Down
- 1. Effects from a volcano eruption
- 2. Construction of factories
- 4. Effects from excess greenhouse gases
- 5. Construction of cities
- 6. Removal of trees in large quantitities
- 8. Cattle produce them