Intro to Energy sources

• What was the primary source of energy for humans throughout most of history?

  Wood
• How has the primary source of energy changed over the past 200 years?

  It has shifted from wood to non-renewable energy resources like fossil fuels and nuclear energy.
• What are fossil fuels?

  Fossil fuels include coal, oil, and natural gas.
• What has been the trend in renewable energy usage over the past 50 years?

  There has been a massive rise in the use of renewable resources like solar, wind, and hydroelectric energy.
• What are the main types of renewable energy resources mentioned?

  • Solar
  • Wind
  • Hydroelectric
  • Geothermal
  • Biofuels
  • Tidal
• What are the primary uses of energy in the UK?

  Most energy is used for transport and domestic purposes.
• What fuels are primarily used for transport in the UK?

  Petrol and diesel.
• How were trains traditionally powered, and how are they powered now?

  Trains were traditionally powered by coal, but now most are powered by electricity.
• What is the main source of energy for heating in UK households?

  Natural gas.
• How does a solar water heater work?

  It uses the sun's energy to heat water, which is then pumped through radiators.
• What is the role of biofuels in heating?

  Biofuels can be burned to heat water in a manner similar to coal.
• Is electricity itself renewable or non-renewable?

  Electricity is neither renewable nor non-renewable; it depends on how it is generated.
• What percentage of electricity in the UK comes from fossil fuels?

  Almost 60 percent.
• What percentage of electricity in the UK is generated from non-renewable resources?

  Nearly 80 percent.
• What is the main takeaway regarding electricity sources in the UK?

  The vast majority of electricity is from non-renewable resources.