Chicago’s hazy skies and red sunsets: Smoke from Canadian wildfires and city’s pollution converge for otherworldly display
Ozone is invisible, but the pollutants that produce it — particularly nitrogen oxides — can cause a brownish haze in the sky, according to Brian Urbaszewsk, director of environmental health programs at the Chicago-based Respiratory Health Association.Urbaszewsk said. “So there’s a bunch of overlapping circles here. So it’s not one or the other … but I think it’s pretty safe to say most of what is called visible air quality that people are noticing is wildfire-driven.
— react in sunlight. That means that ground-level ozone is produced more effectively and concentrates more in hot, dry and still weather.Chicago weather: Lack of rain means driest May in almost 30 years. How gardeners, golfers and kayakers cope.Natural ozone is beneficial because it protects humans from the sun’s harmful ultraviolet rays. But ground-level ozone can have a variety of adverse impacts on human health.
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