Earth puzzle

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Across
  1. 5. To keep something in good condition
  2. 7. Things we can use over and over again
  3. 9. Doing something to help the environment
  4. 11. The environment around us
  5. 12. An environment where animals live
  6. 13. A new invention to change something in the world
Down
  1. 1. Heat from emissions that melt glaciers
  2. 2. Making the environment around us full of carbon dioxide
  3. 3. This is when you break it down and form new objects
  4. 4. Not throwing so many things
  5. 6. Sources that will be around for a while
  6. 8. Making something go away or disappear
  7. 10. The blue planet