| A | B |
|---|
| sewage | waste water and human wastes |
| pollutant | material that causes pollution |
| thermal pollution | occurs when air or water is unnaturally heated or cooled |
| groundwater | water from rain or snow that sinks into the earth |
| carbon monoxide | colorless, odorless, poisonous gas made of carbon and oxygen |
| sulfur dioxide | a poisonous gas made of sulfur and oxygen |
| scrubber | a device that removes harmful chemicals from smoke |
| toxic wastes | poisonous chemical wastes |
| landfill | an area where trash is buried |
| recycle | to use again |
| reclamation | a process that makes disturbed land useful again |
| noise pollution | constant loud noises, such as those from traffic |
