Should I be concerned about haze?
When sunlight comes into contact with tiny bits or particles of pollution, this causes haze in the air outside. Haze reduces the clearness and color of what we see. Motor vehicles and burning fuel release haze-causing pollution. Other gases released into the air and carried by wind many miles from the pollution source can form haze.
Serious health problems have been linked to some pollutants that cause haze. Breathing problems and even death can also happen after being exposed to very small amounts. In scenic parks and wilderness areas, haze has reduced how much we can see.
Source: Woman’s Office, U.S. Department of Health and Human Services