Biodiversity and the Effect of Human Interaction on Ecosystems

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Across
  1. 4. these type of chemicals kill animals and plants
  2. 5. this is a rubbish tip
  3. 8. these species need special breeding programmes to conserve their numbers
  4. 9. this is an air pollutant caused by burning fuels
  5. 12. cows produce a lot of this gas!
Down
  1. 1. this should be carried out as an alternative to dumping in landfill
  2. 2. you find peat in one of these!
  3. 3. the number and variety of organisms found in an area
  4. 6. these are grazed on land which used to be forest
  5. 7. these are being used up as populations grow and living standards increase
  6. 10. the planet that the future of the human species relies on
  7. 11. this needs to be managed to prevent pollution