provision of energy in the UK

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  • provision of energy in the UK
    • how is demand changing?
      • energy consumption has fallen
        • decline of heavy industry
        • improved energy conservation
          • low energy appliances
          • better building insulation
          • more fuel-efficient cars
    • how and why has the energy mix changed?
      • no longer self sufficient
        • about 75% of oil and gas reserves have been exhausted
        • in 2018, 36% of UK's energy was imported
      • decline of coal due to concerns about gg emissions and ageing power stations
      • fossil fuels are likely to remain important
        • remaining reserves last several decades
        • cheap coal imports
        • existing power stations use fossil fuels
        • shale gas deposits to be exploited
    • how has the energy mix changed?
      • by 2020 the UK aims to meet 20% of its energy requirement from renewable sources
      • in 1990 almost 75% of energy came from fossil fuels
        • by 2007 there was an equal mix of coal, gas and nuclear
          • by 2014 renewable sources had become more important
    • fracking
      • high pressure liquids are introduced to fracture shale and release gas
      • concerns
        • risk of earthquakes
        • pollution of underground water sources
        • expensive

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