Pennsylvania’s medical marijuana program has been around for nearly eight years, but the safety of cannabis has come into question due to recent studies, prompting state lawmakers on Wednesday to advance legislation aimed at better program oversight. Despite existing rules regarding testing cannabis grown in Pennsylvania for the state’s medical marijuana program, concerns have increased about what may be in the plant, and the products made from it, that could be potentially harmful. Reports the past two years have shown an alarming amount of contaminants in marijuana – including ...