| A | B |
|---|
| hazardous waste | waste that can pollute the environment even when it occurs in small amounts |
| litter | trash that is in the wrong place |
| pollutant | a material that causes pollution |
| pollution | the addition of harmful material to the environment |
| biodegradable materials | matter that breaks down easily in the environment |
| compost | decayed material from once-living things that is used to enrich soil |
| decomposer | a living thing that breaks down the remains of dead organisms |
| recycle | to collect old materials, process them, and use them tot make new items |
| Examples of hazardous waste | motor oil, paint, insect sprays |
| biodegradable materials | paper and wood |
| compost piles | grass clippings, leaves, kitchen scraps, some paper |
| conservation | to save energy or resources, to use again and again |
