Environmental Words

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Across
  1. 3. A rock the orbits the Earth.
  2. 5. A system of life.
  3. 8. A harmful thing in the environment.
Down
  1. 1. Something harmful to people or animals.
  2. 2. Changing waste into something useful.
  3. 4. The natural world.
  4. 6. The nearest star.
  5. 7. The power needed to do activities.