Across
- 2. The commerce of non-domesticated animals.
- 5. Habitat destruction.
- 7. The improvement of an urban area by building.
- 8. The presence of toxic chemicals in soil.
- 9. Waste material.
Down
- 1. The process of becoming desert.
- 3. A form of precipitation with acidic components.
- 4. It is the increase in the number of people in a population.
- 6. The illegal practice to hunt animals.