Across
- 5. The presence in or introduction into the environment of a substance which has harmful or poisonous effects.
- 7. The action of clearing a wide area of trees.
- 8. The process of cutting down trees.
Down
- 1. The remains or impression of a prehistoric plant or animal embedded in rock and preserved in petrified form.
- 2. The variety of plant and animal life in the world.
- 3. No longer existence.
- 4. A place of tall trees and full of biodiversity.
- 6. The upper layer of earth in which plants grow, a black or dark brown material typically consisting of a mixture of organic remains, clay, and rock particles.