Even in the early 80's when I was a kid the smog was terrible. I remember some days the air in Los Angeles was so bad you couldn't see across the street. My lungs would hurt when I took a deep breath after playing outside all afternoon. L.A. has been progressively turning into a deeper shit hole year by year. I'm glad I don't live there anymore.
http://www.metacafe.com/watch/305366/kids_magic_trick/