Across
- 3. human action that can reduce waste (7)
- 4. layer of gases around Earth (6)
- 6. cause of air pollution from vehicles (4)
- 7. of species can reduce this (9)
- 8. of land for crops and livestock (11)
Down
- 1. waste in rivers and oceans (9)
- 2. help reduce this greenhouse gas (7)
- 4. of preserving natural resources (11)
- 5. down forests (12)