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Atmosphere (Evolution (C can be trapped in fossil fuels and rocks (when…

- - - - first billion of years
      - covered in volcanoes, released lots of gases
      - CO2, with virtually on O2
      - like Mars and Venus
      - Also release N, water vapour, methane and ammonia
  - - - series of reactions to form carbonate percipitates
        that formed sediments on the seabed.
  - - - 80% N2, 20% O2,
      - less than 1%, CO2, noble gases and water vapour
- - - - tax cars based on O2
      - put cap on company emissions
    - - alternative technology expensive, should
        get cheaper as more widely used
      - Carbon capture and stordage at deveopmental stage
      - government worried about economic growth
        especially those still developing
      - all not on board so difficult to get international agreements
      - lifestyle changes
        
        save energy at home
        
        not air travel
        
        cycle or walk to work
- - - - solid particles
        
        called particulates
        
        soot (C)
        
        unburned HC
        
        problems
        
        inhaled can damage lungs
        
        reflect light back into space, global dimming
      - CO
        
        can stop your blood from carrying oxygen
        
        binds to haemoglobin that normally carries O2
        
        low O2, can lead to
        
        fainting
        
        coma
        
        even death
        
        more dangerous as no colour or smell
      - CO2
  - - - can cause respiratory problems when inhaled
      - mix with water in clouds form dilute
        sulfuric acid or nitric acid, acid rain
        
        kill plants, damage buildings, corrode metals
- - - - Deforestaton, less CO2 removed
      - buring fossil fuel, locked C released as CO2
      - Agriculture, more farm animals, more methane
      - Creating waste, more CO2 and methane
        released by decomposition of waste
  - - - 1) temp varies naturally
      - recently average increase more than naturally
      - Most say this due to CO2 by human activity
      - peer reviewed so reliable
      - but hart to fully undestand as very
        complex, so models oversimplified
      - so speculation about link in media, biased or only gives some information
    - - polar ice melting leading to flooding
      - changes in rainfall patterns, some too much
        , some too little, so affect food production
      - Storms frequency and severity may increase
      - change in temp and amount of water may affect
        wild species, leading to changes in their distribution.