| A | B |
|---|
| biomass | organic matter used as fuels |
| cogeneration | one source producing two types of energy |
| deforestation | cutting down trees without replacing them |
| bioremediation | using organisms to clean up toxins |
| conservation | controlled use and protection of resources |
| desalination | purification of water by removing salt |
| desertification | loss of topsoil in dry areas |
| energy efficiency | use of natural resources which reduces amount of waste |
| fossil fuel | includes peat, coal, petroleum, and natural gas |
| gangue | left-over material from mining operations |
| geothermal energy | uses Earth's volcanic activity |
| solar energy | uses Sol's radiation |
| natural resource | materials provided by Earth |
| nonrenewable resource | resources that take millions of years to form |
| renewable resources | resources which are used at a rate which allows replacement |
| nuclear energy | uses fission to produce electricity |
| ore | mined for profit |
| photovoltaic cell | converts sunlight into electricity |
| wind energy | uses flow of Earth's atmospheric gases |
| recycling | use of old products to make new ones |
| smog | type of air pollution |
| sustainability | use of resources so that they don't run out |
| hydroelectric energy | uses flowing water |
