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Causes of Climate Change (Physical (Milankovitch's Theory (Changes in…

- - - - Accounts for 3/4 of warming from human greenhouse gas emissions
      - Burning fossil fuel such as coal, oil and gas
      - Deforestation is very significant
    - - 14% of impact from human greenhouse gas emissions
      - Agriculture - livestock and rice fields
      - Fossil fuel extraction
      - Decay of organic waste
      - Doesn't last as long as CO2 but is more potent per gram
    - - 8% pour warming caused by human greenhouse gases
      - Agriculture - nitrogen fertilised soil and livestock waste
      - Industrial processes
      - More potent per gram than methane
    - - 1% of warming caused by human greenhouse gases
      - Industrial processes
      - More potent per gram than nitrous oxide
    - - Developed in the 30s for use in refrigerators, aerosols and air-conditioning systems.
      - The compounds found in CFCs are greenhouse gases and cause enhanced greenhouse effects.
  - - - More demand for space for farming, housing and transportation.
      - Cutting down and burning trees, releases huge amounts of carbon dioxide.
      - Stops those trees from taking in carbon dioxide from the atmosphere and releasing oxygen.
    - - Needs space so causes deforestation.
      - Farm animals give off methane, especially cows as do crops like rice which we grow in large quantities.
      - Big farm vehicles give off a lot of carbon dioxide.
    - - Gives off a lot of carbon dioxide from the increase in vehicles and their production.
      - Needs to clear land in order to build roads so can destroy habitats.