I blasted this view from Griffith Observatory with textures, so, don't be alarmed. The air quality is generally not this bad. It can be worse! However, if you are interested in persistently poor air quality, just drive 100 miles north to Bakersfield where the northern part of the state deposits all their excess pollutants because of wind direction and the mountain bottleneck at the southern end of the San Joaquin Valley. Of course, vehicular traffic, cannabis particulates and the Delta smelt also contribute to the poor air quality. Delta smelt excrements are so potent, they have sucked the sense out of a lot of people and the water right out of the Central Valley. Just kidding about the cannabis! Now, where did I put that fatty? Speaking of sucking, do you think San Francisco will ever replace Alcatraz with a desalination plant so we can drain Hetch Hetchy?
By the way, @ellogreen, don't get your knickers in a wad because I didn't mention the oil or agricultural industries as pollutant contributors. They are, but, nothing compared to the vehicular traffic that transports all the green products to the north and south of the state. Besides, those industries provide income so we can purchase all the green stuff.
Disclaimer: the above did not start out as a rant, but, the old geezer came out; "Get off my lawn!". What lawn? We don't have any water! WTF? So much for the green. There are no facts to support any of the statements. I just made it up.
Los Angeles, California 2012