As if "organic" marijuana isn't enough of a headache already.
Nate Williams, 20, doesn't get high every day. But when he does, it's legal.
Williams, like others in the San Antonio area, has acquired a taste for herbal blends that contain synthetic marijuana, a chemical that mimics the effects of THC, the molecule that gives pot its psychotropic properties.
It's manufactured and distributed nationwide under brand names like K2, Spice, Black Mamba and Space, to be sold as incense or potpourri — but buyers smoke it, looking for a high similar to marijuana that's available over the counter and won't show up on drug tests.