THE WONDERS OF NATURE

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Across
  1. 3. to use more than necessary, or to use inefficiently
  2. 4. the complex system of relationships between living things and their environment
  3. 6. to put organic waste like vegetable peels, uneaten food, grass clippings and leaves into a large container that breaks it down into healthy soil
  4. 8. animals, birds, insects, etc. living naturally in the wild
  5. 9. can be used without running out, esp. of energy sources like solar and wind
  6. 10. to keep something in its original state
  7. 11. to travel from home to work and back
  8. 12. to use again
  9. 13. to release waste substances into the air, water and soil
  10. 14. dioxide a gas that's released when carbon is burned (for example coal or oil), or when people or animals breathe out
Down
  1. 1. fuel a fuel like oil or coal formed from very old plant and animal fossils
  2. 2. to make something new from materials that have been used before
  3. 4. no longer existing or lost forever (of an animal bird or plant species)
  4. 5. to give money or goods to an organization you want to help or support
  5. 7. the planting of trees and plants to help a damaged or destroyed forest recover