Earth Day!

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Across
  1. 4. everything outdoors that is not made by people, like trees, animals, rivers, and mountains
  2. 6. the dirt or ground where plants grow
  3. 8. to use something again instead of throwing it away
  4. 9. dirty things like smoke, trash and chemicals that hurt the earth
Down
  1. 1. the invisible gas we breathe
  2. 2. everything around us: the air, water, animals, and land
  3. 3. the planet we live on
  4. 5. power we use to do things, like turning on the lights or running cars
  5. 6. energy that comes from the sun
  6. 7. to turn old things, like paper and plastic, into something new so that we don't waste them
  7. 10. a huge body of salt water that covers most of the earth