A scientist inspects a marijuana plant with a pair of tweezers while wearing protective equipment.
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Legal Marijuana Containing Dangerous Mold Still Considered “Safe” by States

Marijuana’s humid growing conditions are a paradise for dangerous mold. States with legal marijuana make growers hire laboratories to check for concentrations of mold and other contaminants that can sicken or kill. But laboratories in many states appear to underreport concentrations of contaminants, a Wall Street Journal analysis found.