their is no such thing as pure,even the ones we claim to be pure we have no idea of their history.all it takes is a raven to shit some seeds on the other side of who knows were.and as we do more inbreeding of the latest clone only we cause even less diversity,when theirs so much money in breeding hyped up internet strains,why bother to do real breeding,or why look for recessive traits we kept out of the gene pool based on its inability to make quick cash.and now you have seed hacks selling thier fast flowering big cola genetics to the indigenous farmers around the globe,we can only assume that even plants indigenous to an area are being polluted.Then you have dave watson aka sam the skunkman aligned with big pharma(makers of sativa ex,might of spelled it wrong)putting patents on genetics,which will lead to cannabis takeing a massive nose dive.Because politicians big pharma and government in one big room have proven that greed rules and nothing else.i can tell you legalization is just around the corner but dont expect it to be great for the cannabis world.cant wait for synthetic cannabis.