and research. the reason? to control the quality and distribution all what it from the soil to the study. >> this is where marijuana has grown for federal reserve and there is nothing in the fields. >> there hasn't been for six years you say. >> that is correct. last time we grew was 2007. >> reporter: mahmoud is the farm's director. >> we are not growing because there is not much demand or the material. >> reporter: why isn't there more demand? >> no research protocols. no research proposals. 0 no requirement for the material. >> reporter: that was then. this is now. nearly two years later, there is acre upon acre of marijuana. ever wonder what a revolution looks like? >> dr. sanjay gupta, i went to