adj.clouded with a mixture of smoke and fog

"the smoggy atmosphere of Los Angeles"

Once upon a smoggy day in London town...
[Feature] Clear findings, smoggy debate
Smoggy Environment Recognition by Combining Infrared and Visible Images
Smoggy-Link: Fingerprinting interference for predictable wireless concurrency
Cool roofs and pavements to help hot smoggy cities
Finely dispersed brown carbon in a smoggy atmosphere
Smoggy with a chance of altruism: the effects of ozone alerts on outdoor recreation and driving in Atlanta.
The characteristic of dust from sources during smoggy pollution in Chiang Mai Province, Thailand
If you think Mark Zuckerberg running through smoggy Beijing without a mask is bad, wait until you see the water
PM10 in the atmosphere and incidence of respiratory illness in Chiangmai during the smoggy pollution