| A | B |
|---|
| renewable | type of resource that can be replenished |
| solar power | example of a renewable resource |
| nonrenewable | type of resource that can not be replenished |
| fossil fuels | these are all nonrenewable resources |
| erosion | Contour plowing can help eliminate this |
| desertification | caused by farming, overgrazing and drought |
| sustainability | way of using natural resources without depleting them |
| deforestation | loss of forests |
| pollutant | any harmful material that can enter the biosphere through the land, air, or water |
| acid rain | N and S compounds combined with water vapor |
| biodiversity | the sum total of the genetically based variety of all organisms in the biosphere. |
| extinction | a species disappears from its range |
| endangered | a species that is in danger of becoming extinct |
| ozone layer | layer of gas in the atmosphere that protects us from harmful UV radiation |
| CFCs | substance that was banned in 1987 because it was destroying the ozone layer |
| biological magnification | concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or food web. |
