Closer to the ground, ozone can also be created by photochemical reactions between the sun and pollution from vehicle emissions and other sources, forming harmful smog. Although warmer-than ...

Ozone, along with the other brown haze-y photochemical smog we see in metro cities, really puts humans through the wringer. We’ve seen it linked to decreased vision and shortness of breath.

“The two things tend to travel together,” he said, noting that this mix of ozone and particulates is conventionally known as “smog.” Looking back at a past in which oil and gas were ...

Photochemical Smog: It is formed when the sun interacts with nitrogen oxides and volatile organic compounds in the atmosphere. It produces ground ozone, among other air toxins. It is much more ...