| A | B |
|---|
| natural resources | a material that is found in nature and that is used by living things |
| renewable resources | a resource that can be replaced quickly |
| nonrenewable resource | a resource that, when it is used up, will not exist again during a human lifetime |
| pollution | harmful material that is added to the environment |
| conservation | the saving of resources by using them wisely |
| reduce | to use less of a resource |
| reuse | to use a resource again and again |
| recycle | to reuse a resource by breaking it down and making a new product. |
