Testing for Tainted Marijuana Challenges States
State regulators have had no guidance from the federal agencies that usually set health and safety standards for agriculture, food and medicine because the federal government considers marijuana to be illegal.
People don’t just smoke marijuana. They vaporize it, bake it into brownies, use it in eye drops, and rub extracts of it onto their skin.
Some people use the drug as medicine, others for the fun of getting high.
In states that have legalized pot, regulators have struggled to make sure the bewildering array of products on dispensary shelves are safe to consume.
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