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Nonpoint sources are dispersed and often difficult to identify.
非點狀污染為分散且經常難以辨識
Examples are pesticides blown from the land into the air and the runoff of fertilizers and pesticides from farmlands,lawns,gardens,and golf courses into streams and lakes.
舉例來說,殺蟲劑隨風飄動,從土地到空氣和肥料的徑流,以及殺蟲劑從農田.草地.園林和高爾夫球場到小溪和湖泊.
It is much easier and cheaper to identify and control or prevent pollution from point sources than from widely dispersed nonpoint sources.
點狀污染比廣大分散的非點狀污染較簡單.容易辨識和控制及預防污染