Mycologist and author Peter McCoy of RadicalMycology.com takes on the question - "I'm attempting your technique of decomposing cigarette butts with oysters. I have them growing on coffee grounds and I'm curious about using coffee as the substrate. I know it's probably not the best, but can I move to feeding it cigarette butts or would it be too much? And I'm also curious as to  whether or not there's more research done that suggests that the mycelium can broke down all or some of the toxins from used cigarettes butts." To learn more about Peter and see all of the ASK Peter episodes visit permaculturevoices.com/peter. Support the show at permaculturevoices.com/support.