| A | B |
|---|
| solid waste | any unwanted or discarded material that is not a liquid or a gas |
| municipal solid waste | solid waste produced from homes and buisnesses in or near urban areas |
| hazardous waste | any discarded solid or liquid material that contains one or more of 39 toxic, carcinogenic, mutagenic, or teratogenic compounds, flammable, reactive, or corrosive |
| recycling | collecting and reprocessing a resource so that it can be made into new products |
| compost | material that is rich in organic matter and soil nutrients |
| primary or closed-loop recycling | wastes are recycled to produce new products of the same type |
| secondary or open-loop recycling | waste materials are converted into different products |
| reuse | to use a product over and over again in the same form |
| pay-as-you-throw system | requiring households and buisnesses to pay directly for garbage collection based on how much they throw away |
| sanitary landfill | waste disposal site on land in which waste is spread in thin layers, compacted, and covered |
| toxic waste | form of hazardous waste that causes death or serious injury |
| bioremediation | the use of microorganisms to destroy or convert toxic substances into harmless forms |
| phytoremediation | use of plants to remove toxic metals from soils or wastes |
| deep-well disposal | liquid hazardous wastes are pumped through a pipe into dry, porous, geologic formations, or fracture zones of rock beneath water supplies |
| surface impoundment | ponds, pits, or lagoons used to store hazardous wastes |
| dioxin | family of 75 chlorinated hydrocarbon compounds formed as unwanted by-products in chemical reactions |
