What Wildfire Smoke Does That Causes Your Eyes To See Fiery Red Sunsets

DENVER (CBS4) – For the past few days northwest winds in the upper atmosphere have been transporting smoke from dozens of western wildfires into Colorado and that’s been creating problems with air quality.
The smoke has prompted the Air Quality Division of Colorado Department of Public Health and Environment to issues advisories for much of the state.
(credit: CBS)
But the smoke has also been making for some amazing color in the sky, especially at sunset.
So why at sunset or sunrise