| A | B |
|---|
| ecology | The study of living things in their natural surroundings. |
| environment | Natural surroundings. |
| natural resources | Useful materials that come from the earth. |
| pollute | To make unclean or contaminate. |
| recycle | When people re-use natural resources. |
| sustainable yeild | The maximum rate at which people can use a renewable resource without reducing the ability of the resource to renew itself. |
| renewable Resources | Materials that can be replenished through natural/human processes. |
| non-renewable resources | Resources that exist in fixed amounts, and once they're used up, they're gone forever. |
| perpetual resources | Resources that last forever. |
