Beware of Exhalations –
March 19, 2018 – He started thinking: San Franciscans would never tolerate those levels of cigarette smoke in a public place anymore. So why were they OK with smoke from burning pot? Did people just assume that cannabis smoke isn’t harmful the way tobacco smoke is? … University of California, San Francisco. “And for a few naive split seconds I was thinking to myself, ‘Hey, they can’t smoke in AT&T Park! I’m sure that’s not allowed.’ And then I realized that it was all marijuana.” Recreational pot was not legal yet in the state, but that stopped no one. “Paul McCartney actually stopped between numbers and sniffed the air and said, ‘There’s something in the air — must be San Francisco!’ “ Springer recalls. As the visible cloud of pot smoke took shape, so did Springer’s idea to study the effects of secondhand marijuana smoke.