(AP) — Colorado’s marijuana experiment is threatened by the popularity of eating it instead of smoking it. Afraid consumers are eating too much weed, the state’s marijuana industry gathered with regulators and law enforcement Wednesday to brainstorm ways to prevent dangerous reactions from overconsumption.

The ideas under discussion include marking edible pot like ski slopes, a guide Coloradans are very familiar with. Weak marijuana products would have green dots, grading up to black diamonds for the most potent edibles.

Colorado already requires edible marijuana to be sold with a “serving size” of 10mg of THC, marijuana’s intoxicating chemical. The work group is considering how to increase consumer education after reports of consumers eating too much and having dangerous reactions.