They wanted breathable air! The first piece to the Los Angeles smog puzzle was its smell, which was different from the sulfurous smog that claimed lives in Donora, Pa., and London, England. In those ...

Smog is a mix of smoke and fog, and there are two main types: Photochemical smog and Sulfurous smog. Photochemical smog is the most common. Photochemical smog, often referred to as 'Los Angeles ...