El Cultivo Ecologico del Cannabis : Un Manual Practico by José T. Gállego

You can call it hemp, marijuana, ganja, bhang, weed and a dozens of names more. Throughout history the production of hemp has been instrumental in the development of civilization. Sails and ropes of the ships were of hemp, also paper, sheets, towels. Hemp can get oil, fuel, food, paintings, biomass, medicine and more.