Climate change

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Across
  1. 5. billion, the projected world population in 2060
  2. 6. warming, Rise in temperature of air, land and sea
  3. 8. the name given to gases that trap heat betwen the earth and upper atmosphere
  4. 9. the problem gas produced by cattle flatulance
  5. 11. level, the average sea height between low and high tide
  6. 12. the waste gases produced from mechanical, industrial and biological processes
Down
  1. 1. layer protecting the earth from solar radiation
  2. 2. an estimate of future conditions
  3. 3. holes drilled deep through earth or ice
  4. 4. change, change in the average weather in a zone over a long period of time
  5. 5. a consistent increase or decrease
  6. 7. refers to living organisms within the community
  7. 10. organic fuels used for heat, cooking, electricity production and transport