The mold and bacteria was so widespread and potentially dangerous that the UC Davis academics concluded that they cannot recommend smoking raw or dried weed. "We cannot recommend inhaling it," says George Thompson III, an associate professor of clinical medicine at the university who helped conduct the cannabis research.
Links
[1] http://www.laweekly.com/news/marijuana-is-not-safe-to-smoke-researchers-say-7927826
[2] http://rethinkpot.org/tags/smoking
[3] http://rethinkpot.org/tags/research
[4] http://rethinkpot.org/tags/second-hand-smoke