Across
- 1. gases surrounding the earth or another planet
- 4. release of harmful chemicals into the environment
- 5. the solid outer layer of the earth
- 8. where life exists
- 10. the variety of life in an ecosystem
Down
- 2. unfair action against someone to benefit from their work
- 3. all the water on earth
- 6. the eradication of an animal species
- 7. natural home of an animal/organism
- 9. the surroundings where an organism lives