sustainability

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Across
  1. 1. gasses around earth
  2. 4. the natural destruction of something
  3. 6. prevention of wasteful use of resources
  4. 7. warm blooded animals who do NOT lay eggs
  5. 8. work in a set way to reach a set goal
  6. 9. animals
  7. 10. when plants generate oxygen using sunlight, carbon dioxide and water
  8. 11. mushrooms, mould, yeast
Down
  1. 2. a community of organisms and their physical environment
  2. 3. chopping down a lot of trees
  3. 5. plants
  4. 8. a large number of plants harvested at one time