Unforeseen problems with legalized marijuana market? Whooda thunkit?

Hemp

Variable potency in buds means edible pot products' effects are unpredictable...

and

"...As THC levels climb, the levels of cannabidiol, or CBD, have been declining. That's problematic for medicinal marijuana users since it is more often associated with medical benefits than THC."

and

They've only begun testing for contaminants - "traces of butane... Bacteria and fungi...." [possibilities of] "E. coli or Salmonella...."