cannabis is sometimes used as a "mop crop" to suck up contaminants from the soil after a chemical spill, dumping or a radiation incident.
cannabis is being planted at fukishima in japan to suck up the radioactive isotopes from the soil around the nuclear plant, and it has been used to suck salts out of soil contaminated by seawater or over fertilization.
these successful experiments are NOT indications that the government tobacco companies or shadowy illuminati forces will try to poison your dope.
the position of decriminalization is held only by those who profit from the cannabis status quo, dealers, smugglers and underground growers. these assholes wish to protect their profits, and that is all.
if cannabis were legalized, any dimwit could grow it, resulting in local crops, local farms and possibly some national corporate branding, but most people would get their dope locally, like they used to get their tobacco. Unlike tobacco, dope s easy to grow anywhere in the world, has few serious pests, and relatively minor curing and preparation needed to turn the raw crop into the finished product. some tobacco companies might open their own lines of pre-rolled pre-packaged cannabis cigarettes but it would take years, and a huge investment of capital to set up these types of branded enterprises, and as cannabis is non-addictive, it doesnt really mesh well with the tobacco business model. Cocaine and heroine on the other hand...
dont believe the hype, decriminalization is just more drug war and more illegal, and immoral profiteering on the backs of the patients and recreational users.