Other Free Encyclopedias » Science Encyclopedia for Kids » Going Green

Global Energies

energy gas sun day

There are many forms of green energy, the most important of which is the Sun. The Sun is our ultimate energy source; it provides heat and light. Without the Sun, plants and animals could not survive. In addition, many of the green energies you will learn about begin with energy from the Sun.

We meet our energy needs with the sources listed below. However, most of the world's energy comes from nonrenewable sources.

Renewable Energy Nonrenewable Energy
Solar Energy
  • Heat and light energy from the Sun
  • Renews day after day as the Sun shines
Coal
  • Solid that takes millions of years to form
  • Mined from the earth
Wind Energy
  • Motion energy from the wind
  • Renews day after day as the wind blows
Oil
  • Liquid that takes millions of years to form
  • Pumped from the ground
Hydropower Energy
  • Energy from moving water
  • Renews day after day in waves and flowing rivers
Natural Gas
  • Colorless odorless gas that takes millions of years to form
  • Pumped from the ground
Geothermal Energy
  • Heat and steam energy beneath the earth's surface
Propane Gas
  • Natural gas that becomes a liquid gas at high pressure or at low temperature
  • Found with natural gas and oil
Biomass Energy
  • Plant material and animal waste used to generate energy
Nuclear Energy
  • Stored in atoms-the smallest particles of chemical elements
  • Formed using uranium ore which is mined from the earth
Fossil Fuels and Pollution [next] [back] What does Going Green mean?

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