Hemp generally is defined as cannabis sativa containing less than 1 percent THC, the mind-altering chemical in marijuana. The National Institute for Drug Abuse defines marijuana as cannabis sativa containing more than 3 percent THC.
There are more than 400 varieties of cannabis.
Hemp, known for its strong fiber, is used in a wide range of products, including clothing, canvas, rope, fiberglass, insulation, automobile clutch- and brake-liners, cement and paper.
Hemp seeds are considered a health food rich in essential amino acids.
Hemp seeds can be pressed for oil, which is used in skin lotions, shampoos, soap and cosmetics.
In Russia, hemp butter is considered superior to peanut butter.
Hemp is a stalky plant that typically reaches heights of 8 feet to 12 feet.
Hemp was brought to South America from Spain in 1545. The first use of hemp in North America is attributed to the Puritans in New England, who used it with flax to produce cloth.
Hemp can be grown legally in 32 other countries, including Canada.
Sources: Minnesota Grown Opportunities, a service of the Minnesota Department of Agriculture, the Agricultural Utilization Research Institute and the University of Minnesota; New Hampshire Hemp Council