Synthetic Marijuana.......

The synthetic marijuana is legal in most parts of Texas and the United States. But alarmed by its growing use and easy availability, states and local governments are now scrambling to take "fake weed" off the streets. Authorities say the fake weed appears easily accessible to teenagers. It can be bought in head shops and at gas stations – and also from anyone who can buy the chemical that is sprayed onto herbs to make the product.
Seven head shops in the Dallas area declined to comment on their sale of K2. None would talk about how old – or young – their buyers are, although many shops claim to sell only to adults. Known on the streets as "spice," "genie" or "zohai," K2 is a mix of herbs and flowers sprayed with synthetic cannabinoids. Depending on the potency, it can sell for $30 to $50 for 3 grams. The chemical compound in the spray is similar to THC, the natural active ingredient in marijuana. But it is untraceable in drug tests.