Hemp is the common name for plants of the entire family of Cannabis, although the term is often used to refer only to Cannabis strains cultivated for industrial (non-drug) use. There are so many uses for hemp (see below- and this isn't even all of them!) and it is relatively easy to grow. So why is it illegal to grow in the US? I know, I know- you're thinking- Drugs, Weed, ILLEGAL!
Well... "Hemp contains THC, which is the psychoactive ingredient found in hashish and marijuana. While THC is present in all Cannabis plant varieties to some extent, industrial hemp does not contain an amount to produce any intoxicating effect, even in significant quantities. Industrial Hemp is produced in many countries around the world.
Major producers include Canada, France and China. The United States is the only industrialized nation to continue to ban industrial hemp. While the Hemp is imported in the United States more than in any other country, the US Government does not distinguish between marijuana and non-psychoactive cannabis used for industrial and commercial purposes..." (wiki)
Of course, the US is behind (again)... Hmm, maybe the reason we're not growing hemp is the same reason we don't have solar power...
We need to start growing hemp!