'Efficacious' means effective, or productive as regards the desired effect. This is particularly concerned with cannabis biomass .
Cannabis is versatile because it has so many uses. It's uses can be traced back to thousands of years before Christ.
PRODUCTS WHICH CAN BE MADE WITH OR FROM CANNABIS
medicine, fuel, paper, food, rope, maps, clothes, nets, lace, soap, sails, shoes, plastics, explosives, caulking, fiberboard, paint, sealant, methanol, gasoline, fibre for fuel, bricks, charcoal, auto bodies, packing mass, lubricants, oil for lighting, oil for fuel, oil for lights, animal food, furniture, mats, varnish, lotions, ointments, lacquer, salad dressings....
There are an estimated 50,000 commercial uses. Until about 100 years ago almost all the world's bibles maps, sails, clothes and books were made out of cannabis. Much of the world's population has survived by eating hemp seed, cooked into a porridge called 'gruel'. 