Renewable Energy Sources

• Types of renewable energy

  • Biofuel
  • Geothermal
  • Hydro
  • Sun
  • Tides
  • Wind
• Biofuel

  Uses up plant & animal waste. Replacement engine fuel for transport.
• Biofuel uses up a lot of land which could have been used for food production
• Geothermal


  • Can be used to heat local areas
  • Not available everywhere
  • Can be generated from hot rocks
  • Can be in dangerous, inaccessible, areas
• Hydroelectricity


  • Available at any time
  • Can be started and stopped quickly
  • Areas of natural beauty can be flooded to make dams & reservoirs
• Solar

  • Solar cells on roofs & solar farms generate electricity and heat water.
  • Not available at night
  • Works better in some places than others
• Tides

  • Electricity can be generated at predictable times
  • Extremely expensive
  • Could damage marine habitats
• Water Waves


  • Can generate electricity on a small scale
  • Maintenance impact on marine environment, disrupt shipping
• Wind

  • Low maintenance when established
  • Unreliable unless the wind speed is within range
  • Can be built out at sea