As more states legalize pot, their uneven safety rules can pose a risk

Amid the growing acceptance and legalization of cannabis use across the country, a concerning reality has emerged: The state-by-state patchwork of safety regulations can leave marijuana consumers wandering through a haze of uncertainty, exposing them to potential risks. Under federal law, marijuana is illegal — period. So, it’s up to individual states to determine their own regulations and safety standards. Those inconsistent regulations are part of a broad debate about the U.S. cannabis industry. The 47 states that allow at least some cannabis use (cannabis is still illegal in Idaho, Kansas a...