Green Planet

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Across
  1. 1. Cause of pollution.
  2. 5. Leftovers, the rest of something.
  3. 7. Global...
Down
  1. 2. Clouds.
  2. 3. Cars, cigarette.
  3. 4. Trees and vegetation.
  4. 5. Giving new use to old things.
  5. 6. Our planet.