Air Quality Control: Formation And Sources, Dis... -

: These are emitted directly from an identifiable source. Examples include Carbon Monoxide (CO) from vehicle exhaust, Sulfur Dioxide ( SO2cap S cap O sub 2

Dispersion refers to how pollutants spread and dilute in the atmosphere. It is determined by several critical environmental factors: Air Pollution and Your Health Air Quality Control: Formation and Sources, Dis...

: Large-scale industrial facilities, power plants, and refineries release significant amounts of SO2cap S cap O sub 2 and heavy metals like lead. : These are emitted directly from an identifiable source

: Dispersed activities such as agricultural fertilizer use (releasing ammonia) and the use of household products (VOCs). Natural Sources : These include volcanic eruptions ( SO2cap S cap O sub 2 and ash), wildfires (smoke and PMcap P cap M ), and biological decay ( CH4cap C cap H sub 4 3. Dispersion Factors : Dispersed activities such as agricultural fertilizer use

: Internal combustion engines in cars, trucks, and airplanes are responsible for up to 80% of urban pollution, emitting COcap C cap O NOxcap N cap O sub x PMcap P cap M

) from power plants, and from construction or wildfires.

Sources are generally divided into human-made (anthropogenic) and natural categories: :