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What's Up in the Environment?
1. fuel cell:
An electrochemical battery that produces energy without combustion or rotating parts. Fuel cells combine hydrogen ions with oxygen atoms to create electricity and water.

2. geothermal heating:
"Geo" means earth and "thermal" means heat. Geothermal heating uses technology that transfers heat from below ground to your home.

3. non-renewable energy:
Energy resources that nature can replenish very slowly or not at all. Non-renewable energy, like fossil fuels, may one day run out completely or become depleted to the point where it is too expensive to extract.

4. photo-voltaic cell:
"Photo" means light and "voltaic" means electricity, so in essence, a photovoltaic cell converts sunlight into electricity. Photons free electrons from silicon, the second most abundant element on earth, to create electricity.

5. renewable energy:
Continuous energy flows from sources that nature constantly provides and replenishes. Renewable energy comes from the sun, wind, tides, currents, plants, and earth.

6. solar panel:
A device composed of many photo-voltaic cells that converts sunlight into direct current (DC) electricity. It does not use heat.

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