Across
- 3. when the world's climate becomes warmer or colder
- 4. will cause temperatures to rise worldwide
- 8. gas emitted by burning
- 9. topsoil is washed away by rain
- 11. a layer of the atmosphere that protects us from UV rays
- 12. rainwater is acidic from air pollution
Down
- 1. forests are cut down for lumber or land is cleared for agricultural purposes
- 2. land becomes too dry for farming
- 5. reflectivity of a surface
- 6. a greenhouse gas emitted by cattle
- 7. will cause cities on the coast to be flooded
- 10. should be safe to drink