As California legalizes pot, few smokers realize cannabis is often contaminated with pesticides, mold, heavy metals and chemical toxins

As of yesterday, it’s now legal for adults in California to purchase recreational marijuana. This is being hailed as a breakthrough against marijuana prohibition, but the masses of would-be pot smokers in California seem to carry a popular delusion that rests on the false idea that marijuana is safe to smoke in unlimited quantities because it’s “natural.”