Environment & Science

LA's recent bad air quality thanks to Santa Anas, fog and climate change

A view of the Los Angeles city skyline as heavy smog shrouds the city in California on May 31, 2015.
A view of the Los Angeles city skyline as heavy smog shrouds the city in California on May 31, 2015.
MARK RALSTON/AFP/Getty Images

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Air quality experts say the Santa Ana winds push the pollution from inland areas toward the coast, and the fog pushes that pollution down and stops it from escaping. And climate change encourages the hot, dry weather that smog loves best.