What is environmental sustainability?

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Across
  1. 3. power/ energy derived from the sun
  2. 4. to use less
  3. 6. power/ energy derived from the movement of water
  4. 7. policy/ laws or regulations created by national leaders
  5. 9. a synonym for recycling
  6. 10. the natural world
  7. 11. protocol/ international treaty which seeks to reduce greenhouse gas emissions
Down
  1. 1. a point in question or matter that is in dispute
  2. 2. power/ energy derived from wind turbines
  3. 4. to treat or process as to make suitable for reuse
  4. 5. energy/ new forms of energy which will reduce the reliance on fossil fuels
  5. 8. to take a comprehensive look at a particular issue