They were specifically written because LA was an unlivable smoggy hell. Diesel particulates and ground level ozone was killing people and causing everything fro

They were specifically written because LA was an unlivable smoggy hell. Diesel particulates and ground level ozone was killing people and causing everything from asthma to cancer. I was regularly told to stay indoors growing up in LA. You still get a couple dozen smog days a year, but only a couple extreme days. That is way down from the 150-200 days of extreme smog a year that forced me indoors as a kid.