Particle Pollution

Particulates
Finely divided solid particles or liquid droplets suspendedin air (aersols) 2 types: Fine and course dust.
Fine PArticles
less 2.5mm, cant be seen by eye, and comes from combustion of cars, power plants, wood burning, industry processes
Course dust particles
2.5 and 10 mm and comes fromcruching or grinding operatons, dust from travling vehicle
AQI
PM2.5; PM10
Sources of particulates
Man made, Natural land based, natural oceanic
Man made particulates
fossil fuels, mining, food processing, demolition
Lnad based
duststorms, volvanoes, reactions between ozone andunburned hydrocarbons, forest fires
Oceanic
evaporation of salt spray, fog and haze