| A | B |
|---|
| sewage | waste from sinks and toilets |
| sewage treatment plant | place that processes sewage water |
| diffuse | spread out |
| runoff | water moving over the ground |
| deposit | to put down |
| fertilizer | stuff that helps plants and algae grow |
| nutrients | chemicals plants and algae need to grow |
| nitrogen, phosphorus, and potassium | elements in compounds that are important plant nutrients |
| herbicides | weed killing chemicals |
| insecticides | insect killing chemcals |
| pesticides | animal killing chemcials |
| agriculture | farming and ranching |
| residential | areas with houses |
| urban | city |
| toxic | poisonous |
| sediment | dirt and soil |
| construction | building buildings |
| septic systems | small sewage treatment machines--usually for a single building |
| point-source pollution | pollution from a single source |
| non-point-source pollution | pollution from diffuse sources |
| methane | most potent greenhouse gas |
| carbon dioxide | most abundant greenhouse gas |
| precursor pollutants | chemicals that react with gasses in atmosphere to make polution |
| particulate matter | tiny bits of partially burned matter |
| bacteria | microscopic organisms that can cause illness and death |
