enviromental crosseword

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Across
  1. 2. Power derived from physical or chemical resources especially to provide light and heat
  2. 4. A giant mass of ice that moves slowly down a valley or mountain
  3. 5. The surrounding air, water and land in which we live
  4. 6. The process of making air, water or land dirty and unstate
Down
  1. 1. To treat waste materials so they can be used again
  2. 3. The process of planting trees