DENVER (AP) — Colorado medical marijuana growers would face new restrictions, including how many plants they can cultivate for patients, under a proposal advanced Wednesday by a legislative panel. The goal, the lawmakers say, is to curb abuses in the state's medical marijuana industry, which is taxed at a lower rate than Colorado's new recreational pot businesses. Colorado voters approved medical marijuana in 2000, and the system has remained after voters approved the drug for recreational use in 2012.