| A | B |
|---|
| natural resources | products taken from the Earth |
| reusable resources | products taken from the Earth that can be used over and over |
| renewable resources | products taken from the Earth that can be replaced |
| recycling | using products again in another way in order to conserve resources |
| fossil fuels | source of most of our electricity, made from burning coal, oil, or natural gas |
| nonrenewable resources | products from the Earth that cannot be replaced |
| natural gas | a product found with petroleum that is used for heating and cooking |
| peat | soft brown material which is made up of partly decayed plants |
| lignite | soft brown rock from which the moisture of decayed plants has been squeezed out |
| bitumen | under heat and pressure this form of coal is produced, the most comon type mined and used today |
| anthracite | a hard black rock consisting of almost pure carbon, a coal formed under extreme heat and pressure |
