Marijuana opponents in the federal government are up against the wall and the wall is crumbling. The feds have fought marijuana use for decades, disregarding its medicinal applications, in a senseless war against the herb. The demonized killer weed is turning out to be anything but that. As myths about this ancient herb are dispelled, scientists are using it to treat everything from chemotherapy-induced nausea to different cancers. In August, The British Journal of Cancer published the results of a study that found THC (the main active component in marijuana) is effective in fighting prostate cancer. Reportedly, pot attacks prostate cancer cell types that do not respond to the usual hormone treatments.