Marijuana is a well-known controversial plant that divides people into two groups. It has different names in different countries. For example, here in the United States of America, people have called it weed, hemp, and pot. Moreover, medical people use the name hemp for the plant that grows for non-drug proposes. Marijuana originates from two plants that have the same species. The plants are sativa and indicia. Marijuana produces male and female plants. Both of them have a mind altering chemical called delta-9-tetrahydrocannabinol, THC. In 1928, the house passed a law that prohibited the use of marijuana. In most States the use of marijuana is still illegal. However, states like California, and Colorado as well as the District of Colombia,