| A | B |
|---|
| biomass energy | the total amount of living tissue in a trophic level |
| biofuel | fuel from organic sources |
| biopower | electricity generated by the combustion of organic materials |
| geothermal energy | a type of renewable energy that is generated deep within the earth; produced by the breakdown of radioactive elements and high pressure together |
| ground source heat pump | a network of pipes that circulates water from the ground (for heating) and back into the ground (for cooling) |
| hydropower | electricity generated from the energy of moving water |
| tidal energy | electricity generated from the movement of the tides |
| ocean thermal energy conversion (OTEC) | the process of changing the solar enrgy stored in the ocean to electric power |
| passive solar heating | using the designs of a building (versus technology) to collect, store, and distribute the sun's energy |
| active solar heating | the use of technology to collect, store, and ditribute the sun's energy |
| flat-plate solar collector | a metal box that absorbs the sun's energy to heat water or air |
| photovoltaic (PV) cell | a device that converts solar energy directly into electricity |
| concentrating solar power (CSP) | a technology that uses the heat of the sun to generate electricity; mirrors focus the sun's energy, which is used to heat the waters that fuels electric power plants. |
| wind turbine | a device that converts the wind's kinetic energy into electrical energy |
| wind farm | a power plant that uses wind turbines to generate electricity |
| electrolysis | a process that releases hydrogen by using an electric current to break down water molecules. |
| fuel cell | a device that converts hydrogen or another fuel into electricity. |
