Renewable Energy Resources

Chapter 5 - Section 2

Solar Energy

Advantages


  • Energy comes from the sun
  • Powers many things like calculators, satellites, etc.
Disadvantages



  • Doesn't work as efficiently when cloudy
  • Batteries used to store solar power can wear out and be discarded and cause pollution

Wind Energy

Advantages


  • It is nonpolluting and free
  • Does little harm to the environment and produces no waste
Disadvantages



  • Wind might blow to hard and break the turbine
  • Wind might not blow enough and stop the flow of energy

Hydroelectric Energy

Advantages

  • Energy is from running water
  • The water turbines turn and and generate electricity
Disadvantages

  • Erosion is increased down stream
  • A dam will flood wildlife habitats

Geothermal Energy

Advantages


  • Uses steam in reservoir to produce electricity
  • Uses hot rocks, which are everywhere
Disadvantages
  • Dry rocks and magma are deep in the earth
  • Digging destroys habit like drilling for fossil fuelsr

Biomass Energy

Advantages


  • Can cut down wood to burn and make energy
  • Can make corn into alcohol such as ethanol for fuel
  • Can burn garbage for energy
Disadvantages



  • Burning wood can pollute the air
  • Distilling ethanol uses more energy from burning fossil fuels than the amount of energy that is derived from burning ethanol