| A | B |
|---|
| sewage | waste water and human wastes |
| pollutant | material that causes pollution |
| thermal pollution | pollution that occurs when air or water is unnaturally heated or cooled, causing harm to living things |
| groundwater | water from rain or snow that sinks into the earth and is stored |
| chemical pollution | sewage from factories |
| carbon monoxide | a colorless, odorless, poisonous gas made of carbon and oxygen |
| sulfur dioxide | a poisonous gas made of sulfur and oxygen |
| scrubbers | a device that removes harmful chemicals from smoke |
| acid rain | created when rain mixes with sulfur dioxide |
| toxic wastes | poisonous chemical wastes |
| landfills | areas of land where trash is buried |
| reclamation | process which returns land to a repaired and useful state |
| recycle | to use again |
| noise pollution | constant loud noise, such as traffic |
| environment | everything that surrounds an organism |
