Polluted runoff occurs when rain or snowmelt travels over land and picks up manure and soil from farms, trash, storm water and chemical pollutants from urban areas, and sediment from construction sites.
(Polluted runoff; occurs; T:when rain or snowmelt travels over land and picks up manure and soil from farms, trash, storm water and chemical pollutants from urban areas, and sediment from construction sites) (rain or snowmelt; travels; over land) (rain or snowmelt; picks up; manure and soil; from farms, trash, storm water and chemical pollutants from urban areas, and sediment from construction sites)
Polluted runoff rain or snowmelt rain or snowmelt
occurs travels picks up
T:when rain or snowmelt travels over land and picks up manure and soil from farms, trash, storm water and chemical pollutants from urban areas, and sediment from construction sites
over land
manure and soil from farms, trash, storm water and chemical pollutants from urban areas, and sediment from construction sites