Environmental problems

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Across
  1. 3. Rain that contains harmful chemicals and damages plants, soil, and buildings.
  2. 4. The cutting down or removal of large areas of trees and forests.
  3. 6. To use something again instead of throwing it away.
  4. 8. The illegal hunting or capturing of wild animals.
Down
  1. 1. Dangerous materials or chemicals that can harm people or the environment.
  2. 2. When an animal species no longer exists anywhere on Earth.
  3. 5. A protected area of land where wildlife is kept safe from harm.
  4. 7. A type of air pollution that looks like thick fog over cities.