"Although banned by the U.S. federal government in 1937, it is estimated that 14.6 million Americans use marijuana, which is roughly the population of Calcutta, India. The United States drug market is one of the world's most commercially viable and attracts drug traffickers from every corner of the globe. On American soil, marijuana costs between $400 and $2000 per pound. A pound of higher quality marijuana, known as sinsemilla, costs between $900 and $6,000.
Marijuana comes from the Cannabis Sativa plant and is the most commonly used illicit drug in the United States.
Marijuana is the buds and leaves of the Cannabis sativa plant. This plant contains more than 400 chemicals, including delta-9-tetrahydrocannabinol (THC), the plant's main psychoactive chemical. THC is known to affect our brain's short-term memory. Additionally, marijuana affects motor coordination, increases your heart rate and raises levels of anxiety. Studies also show that marijuana contains cancer-causing chemicals typically associated with cigarettes."