| A | B |
|---|
| pollution | causing harm to the natural environment by introducing waste products |
| habitat | the place where a population lives in an ecosystem |
| littering | scattering trash about in an environment |
| environment | the things, both living and non living, that surround a living thing |
| land pollution | causing harm to land by introducing waste products |
| water pollution | causing harm to water by introducing waste products |
| air pollution | causing harm to air by introducing waste products |
| ozone | a layer of oxygen around the earth |
| reduce | to make smaller or to decrease |
| reuse | to use over again |
| recycle | to reuse a resource to make something new |
| conservation | the saving of resources by using them carefully |
| resource | a material that is found in nature and is used by living things |
