Renewables and Trends

• What type of energy source are barrages classified as?


  Renewable
• What is the primary function of barrages?

  To generate electricity
• What is a negative environmental impact of barrages?

  They disturb habitats of nearby wildlife
• What is a characteristic of tides mentioned in the material?

  Tides are predictable
• What are bio-fuels made from?

  Plant products or animal dung
• How are bio-fuels used to generate energy?

  They are burned to generate electricity
• What is a consequence of growing bio-fuels in some regions?

  Large areas of forest are destroyed
• What is one use of bio-fuels besides electricity generation?

  Heating
• What trend occurred in electricity use from 1900 to 2000?


  Electricity use increased
• What are two reasons for the decrease in electricity use from 2000 onwards?


  Appliances are more efficient and careful use
• What are three reasons for the increasing use of renewables?

  • Burning fossil fuels harms the environment
  • Need to prepare for non-renewable depletion
  • Government pressure for renewable energy targets
• What limits the change to renewable energy use according to scientists?

  Cost, social issues, ethical concerns, political issues
• What is the topic of the material?

  Energy