I thought Hemp was related to Marijuana

On the letter to the local representative (http://www.thetruthabouthemp.com) it says that hemp was later renamed marijuana. It is to my understanding that hemp is related to marijuana, but its not the same thing. Hemp doesn't contain THC and also grows like bambo, marijuana grows like a bush. I have read man books which say the same thing. If you go to http://azhemp.org/Archive/Package/Legal/legal.html and about halfways down it says : "Moreover, hemp contains a relatively high percentage of another cannabinoid, CBD, that actually blocks the marijuana high. Hemp, it turns out, is not only not marijuana; it could be called "antimarijuana." "

Hemp and Pot are related in the same way a Yellow Apple Tree is
related to a Red Apple Tree. Hemp and Pot share so much in common,
that hemp can be grown to have high THC, and Pot can be grown to
be all seeds and fiber. It's how it's grown. But perhaps they are
different, but they are so close, both must be legalized and grown
in mess to stop our need for overseas oil and funding terrorist groups
by the illegal status of drugs.