THC, or tetrahydrocannabinol, is the main psychoactive substance in cannabis. THC protects the cannabis plant from herbivores and produces a "high" effect in humans by altering consciousness and perception. Cannabis has been used for millennia both spiritually as an aid to meditation and trance, and medicinally to treat various health conditions. Recreational use of cannabis involves consuming strains with varying THC percentages through traditional methods like joints, bongs, and pipes, as well as more modern vaporizers. Responsible cannabis use involves learning one's limits and being discreet, as legalization could generate tax revenue while reducing criminal justice costs.

1. Recreational THC 101 Jesse James September 2008 Biochemistry and Society

4. Drug Comparison

5. Drug Comparison

9. Strain Names by Taxon Hybrids Ak-47, Blue Diamond, Blue Velvet, Blueberry, Blueberry Kush, Bubble Berry, Bubblegum, Buddha Plant, Cali Orange Plant, Cali Gold Plant, Durban Poison x Mighty Might, Flo, First Mature, Fourway #1, Fruity Pebbles, Full Moon, Jamaican Pearl, Jack Flash, Juicy Fruit, Grapefruit Haze, Himalayan Gold, Island Lady, KC-33, Kerala x Skunk, Kushage, Lemon Stinky, Leda Uno, Northern Berry, NYC Diesel, Purple#1, Purple Skunk, Purple Kush, Purple Alaskan Lightning, Romberry, Sour Diesal, Shaman, Shiva Shanti, Skunk Red Hair, Skunk Passion, Strawberry Cough, Skunk Haze, Swiss Miss, Sweet Island Skunk, Turtle Power, WhiteWidow, White Rhino Sativa Bazooka, Durban Poison, Maui Waui, Early Bud, Early Pearl, Early Skunk Plant, Great White Shark, Green Spirit, Haze, Haze Skunk, Haze Skunk, Hempstar, Jack Herer, Kali Mist, Ice, Lams Bread x Skunk, Niagra x Shiva, Night Queen, Northern Lights x Haze, Power Plant, Purple Haze, Smokey Bear, Silver Haze, Super Silver Haze, Swazi x Skunk, Thai, Voodoo, White Cloud Indica 818 Kush, Afghani, Afghani#1, Amstel Gold, Bella Caio, Big Bud, Black Domina, Black African, Black Jack, Chitral, Celtic Cross, Celtic Stone, Chem Dawg, Chronic, Double Gum, Early Girl, Early Skunk, Eclipse, Euforia, Green Spirit, G-13, Granddaddy Purple, Hawaiian Skunk, Hindu Kush, Holland's Hope, Hypno, Hash Plant, K2, Mango, Master Kush, Mazar, Mighty Might, Niagra, Northern Lights, OG KUSH, Romulan, Pink Indica, Purple High, Purple Urkel, Purple Star, Ruderalis Indica, Shiva, Sour Bubble, Southern Afghani, Super Chrystal, Twilight