STB-3.A—Identify differences between point and nonpoint sources of pollution

Identify differences between point and nonpoint sources of pollution.

• A point source refers to a single, identifiable source of a pollutant, such as a smokestack or waste discharge pipe.
• Nonpoint sources of pollution are diffused and can therefore be difficult to identify, such as pesticide spraying or urban runoff.
• Enduring understanding STB-3: Human activities, including the use of resources, have physical, chemical, and biological consequences for ecosystems.