High on Hemp America’s Most Controversial Crop May One Day Fill Supermarkets and Fuel Automobiles Even if you "Just Say No" to drugs, you've probably crossed state lines many times with large amounts of hemp. And if you haven't, no doubt one day you will. Hemp, a member of the cannabis family of plants, is related to marijuana and illegal to grow in the United States. Nevertheless, hemp is everywhere — in clothing, cosmetics and even in the door panels of more than a million Ford, Chrysler and General Motors cars. Advocates call hemp a miracle crop. It can be...