| A | B |
|---|
| natural resources | Natural substances that living things use. |
| renewable resources | Natural resources that can be replaced. |
| non-renewable resource | Natural resource that can't be replaced. |
| recycling | Used materials are treated for reuse. |
| energy resource | Natural resource used to produce energy. |
| fossil fuel | Non-renewable energy resource that forms in the earth from buried remains. |
| petroleum | Oily, flammabl,organic compound from which fossil fuels are separated.. |
| natural gas | Gaseous fossil fuel. |
| coal | Solid fossil fuel formed underground. |
| strip mining | Stripping rock and soil to mine materials. |
| acid precipitation | precipitation that contains acid due to pollution. |
| smog | A fog created by sunlight and air pollution. |
| nuclear energy | Energy associated with the nucleus of an atom. |
| solar energy | Energy from the sun. |
| wind energy | Energy from the wind. |
| hydroelectric energy | Energy produced by falling water. |
| biomass | Organic matter and waste that contain stored energy. |
| gasohol | A mixture of gasoline and alcohol. |
| geothermal energy | Energy from within the earth. |
