| http://www.w3.org/ns/prov#value | - But hemp contains a negligible amount of THC, the psychoactive compound in marijuana.The plant once was legally grown in the U.S. and used to make rope, fabric and other products.But now under federal law, all cannabis plants including hemp fall under the marijuana label so farmers could get into trouble for growing it.So far, 19 states have passed hemp legislation, including nine that allow its p
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