Across
- 1. Harmful gases responsible for causing global warming
- 4. Liquid chemical waste
- 6. Removal of forest cover
- 9. Another word for contamination
- 10. Decrease of pH value
Down
- 2. Removal of species from the face of the Earth forever
- 3. Excess in the number of people living on the Earth
- 5. Used to make bags and other common substances
- 7. Poisonous substances
- 8. Gradual wearing away of soil