Across
- 5. the act or process of vegetating
- 6. all the different kinds of life you'll find in one area
- 8. a place where waste is buried in the ground in large amounts
Down
- 1. the practice of preserving the natural world to prevent it from collapsing as a result of human activities
- 2. substance capable of being decomposed naturally
- 3. gases in Earth's atmosphere that trap heat
- 4. made from decomposing plants and animals
- 7. presence in the environment of a substance which has harmful or poisonous effects