A bill floating around the Colorado Legislature would doom the state's marijuana industry if it passed. And while the chances of that bill passing are slim — it hasn't even been introduced — its mere existence could signal the start of a battle over the potency of commercial pot products. The bill, drafted by state Representative Yadira Caraveo, would ban any form of legal marijuana, recreational or medical, testing over 15 percent THC. It also calls for a number of restrictions to the state's medical marijuana program, including a requirement that medical marijuana patients only be allowed to purchase a pre-designated dosage and allotment of certain products decided by a physician, similar to a drug prescription.