Terms : Hide Images
| 6290168066 | Biofuel | Liquid fuel created from processed or refined biomass. | 0 | |
| 6290168067 | Modern carbon | Carbon in biomass that was recently in the atmosphere. | 1 | |
| 6290168068 | Fossil carbon | Carbon in fossil fuels. | 2 | |
| 6290168069 | Carbon neutral | An activity that does not change atmospheric CO2 concentrations. | 3 | |
| 6290168070 | Net removal | The process of removing more than is replaced by growth, typically used when referring to carbon. | 4 | |
| 6290168071 | Ethanol | Alcohol made by converting starches and sugars from plant material into alcohol and CO2. | 5 | |
| 6290168072 | Biodiesel | A diesel substitute produced by extracting and chemically altering oil from plants. | 6 | |
| 6290168073 | Flex-fuel vehicle | A vehicle that runs on either gasoline or a gasoline/ethanol mixture. | 7 | |
| 6290168074 | Hydroelectricity | The production of electrical power through the use of the gravitational force of falling or flowing water. | 8 | |
| 6290168075 | Run-of-the-river | Hydroelectricity generation in which water is retained behind a low dam or no dam. | 9 | |
| 6290168076 | Water impoundment | The storage of water in a reservoir behind a dam. | 10 | |
| 6290168077 | Tidal energy | Energy that comes from the movement of water driven by the gravitational pull of the Moon. | 11 | |
| 6290168078 | Siltation | The accumulation of sediments, primarily silt, on the bottom of a reservoir. | 12 | |
| 6290168079 | Oxygenated fuel | A fuel with oxygen as part of the molecule. | 13 | |
| 6290168080 | Cellulosic ethanol | An ethanol derived from cellulose, the cell wall material in plants. | 14 | |
| 6290168081 | Active solar energy | Energy captured from sunlight with advanced technologies. | 15 | |
| 6290168082 | Photovoltaic solar cell | A system of capturing energy from sunlight and converting it directly into electricity. | 16 | |
| 6290168083 | Wind farm | An area of land with a group of energy-producing windmills or wind turbines. | 17 | |
| 6290168084 | Wind turbine | A turbine that converts wind energy into electricity. | 18 | |
| 6290168085 | Geothermal energy | Heat energy that comes from the natural radioactive decay of elements deep within Earth. | 19 | |
| 6290168086 | Ground source heat pump | A technology that transfers heat from the ground to a building. | 20 | |
| 6290168087 | Fuel cell | An electrical-chemical device that converts fuel, such as hydrogen, into an electrical current. | 21 | |
| 6290168088 | Electrolysis | The application of an electric current to water molecules to split them into hydrogen and oxygen. | 22 | |
| 6290168089 | Smart Grid | An efficient, self-regulating electricity distribution network that accepts any source of electricity and distributes it effectively to end users. | 23 |
