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| energy from sources that are replenished over short time scales or that are perpetually available |
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| source, the energy must be renewable, with a low enough enviromental impact that it can be used for the long term |
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| Active Solar technologies |
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Definition
| convert solar energy directly into electricity |
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| another active technology that captures solar energy for heating |
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| the heat stored underground, contained in either rocks or fluids |
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| A system that actively moves heat form the underground into a house to warm it or removes heat from a house to cool it |
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| The amount of time it would take to save enough money in operation costs to pay for the equipment |
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| power plants that use the heat of hydrothermal reservoirs to produce steam and turn turbine to generate electricity |
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| The energy produced from moving water |
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| Efforts that reduce waste and increase efficent use of resources |
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| Energy from sources that are replenished over short time scales or that are perpetually available |
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| Sustainable Energy Source |
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| Energy sources that are renewable and have a low environment impact |
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| Energy contained in the motion of air across Earth's surface |
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| Energy harnessed from the Sun in the form of heat or light |
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| Also called solar cells, PV cells convert solar energy directly into electricity |
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| Active Solar Technologies |
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Definition
| The use of mechanical equipment to capture, convert, and sometimes concentrate solar energy into a more usable form |
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Definition
| An active technology that captures solar energy for heating |
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| Passive Solar Technologies |
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| The capture of solar energy (heat or light) without any electronic or mechanical assistance |
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Definition
| The heat stored underground, contained in either rocks or fluids |
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Definition
| Efforts that reduce waste and increase efficient use of resources |
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Definition
| A system that actively moves heat from the underground into a house to warm it or removes heat from a house to cool it. This is used in over half a million homes around the world |
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Definition
| This is power generated by moving water, but it can potentially significant environmental and social costs |
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| Power plants that use the heat of hydrothermal reservoirs to produce steam and turn turbines to generate electricity. They are reliable and efficient, but they are dependent on location. |
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| The amount of time it would take to save enough money in operation costs to pay for the equipment. This is used for geothermal heat pumps. |
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| Since sustainable energy sources have their own strengths and weaknesses, no single source will likely meet the needs of any particular community. |
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