I am the energy in things that used to be alive. My energy is stored in trees, plants,and garbage. You can burn me to make heat and electricity. I can pollute the air when I am burned.
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Petroleum
Wind
Biomass
I am heat energy from inside the Earth. I heat underground rocks and water. Some-times I am buried too deep to use. I am clean energy.
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Wind
Biomass
Geothermal
I am the energy in moving water. Dams can harness my energy. My power can make electricity. I am clean, cheap energy.
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Wind
Natural gas
Hydropower
I make plants grow and I give you light. I make the wind blow and the rain fall. Today, it costs a lot to harness my energy. Photovoltaic cells can turn my energy into electricity.
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Solar energy
Water
Geothermal
I am the energy in moving air. Some places have a lot of me, others only a little. Machines with blades capture my energy, turning it into electricity. I don't pollute the air, but cause noise pollution.
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Wind
Nuclear power
Solar energy