The DEA has taken emergency action to outlaw chemicals used to make synthetic marijuana, meaning it will be illegal to possess or sell them in the U.S. for at least one year, until further action is taken.

The chemicals used to make "fake pot" products, also known as K2, will be studied by the Department of Health and Human Services to determine whether the chemicals and the products should be permanently controlled, the DEA said.

"Over the past year, smokable herbal blends marketed as being 'legal' and providing a marijuana-like high, have become increasingly popular, particularly among teens and young adults," the DEA said in a statement."These products consist of plant material that has been coated with research chemicals that mimic THC, the active ingredient in marijuana, and are sold at a variety of retail outlets, in head shops and over the Internet. These chemicals, however, have not been approved by the FDA for human consumption, and there is no oversight of the manufacturing process."