| A | B |
|---|
| Nonrenewable Resource | A resource that cannot be replaced once it is used up |
| Renewable Resource | A resource that can be replaced within a reasonably short period of time |
| Pollutant | An unwanted substance in the air, water, or land |
| Fossil Fuels | Nonrenewable resources formed from the remains of plants that lived millions of years ago |
| Reducing, Reusing, and Recycling | Ways to conserve and protect our resources |
| Ozone | Oxygen molecules that protect the earth from harmful ultraviolet rays |
| Greenhouse Effect | The cause of global warming |
| Resource | Something that people use |
| Fresh Water | Water from groundwater, lakes and rivers which is used for drinking and farming |
| Salt Water | 97% of the earth's water found mostly in the oceans |
