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Characters, do those indicate anything for you? >> let's put it like this, you've got to remember it's been in the sea for a long time. so you can't actually read it. it could be -- the point is you want it to be definitive. so there's a big question mark. they will actually try and scrape away at the surface very very gently and use various solvents in order to get through to the substrate where all the prints will be. it can be done. so forensically they can get down and reveal all the words and characters. and that will give them a clear indication as to where it came from. and there are am...

And products to make concentrate with. all of the little trimmings that you don't smoke, everything still gets the thc crystals all over it. >> there is so many uses for one plant between your whole bud that you're selling and your fan leaves which you're making into an oil for your edibles to your sugar leaf you're making into a concentrate. >> hash is now made using hydro carbon extraction using butane as the solvent. the difference being that the wax is going to be whipped and so it becomes frothy. and so there is residual solvents that come out a lot faster. you got a 12-hour purge on that...

>> all of the little trimmings that you don't smoke, everything still gets the thc crystals all over it. >> there is so many uses for one plant between your whole bud that you're selling and your fan leaves which you're making into an oil for your edibles to your sugar leaf you're making into a concentrate. >> hash is now made using hydro carbon extraction using butane as the solvent. the difference being that the wax is going to be whipped and so it becomes frothy. and so there is residual solvents come out a lot faster. you got a 12-hour purge on that. whereas the shatter you're looking at n...

The first three patients i met were cancer patients who looked me in the eye and told me if they didn't have the anti-nausea effects and the appetite stimulant and the help sleeping that they wouldn't have survived chemo therapy, and i believed them. >> that was sort of your time of conversion? >> that was my turning point. >> and now on this mountainside, they expect to grow more than 1,000 pounds of medical marijuana in 2014. some is sold to smoke. some is sold as an oil to ingest. >> so what we're talking about is literally taking this and turning it into this? >> that's right. >> the scien...

Strict quality control. >> we can test for pesticides. we can test for molds, mildews. we can test for residual solvents. >> testing for contamination. it's one of the biggest hurdles to creating a safe product. recent studies on the contamination on medical marijuana are pretty alarming. one paper showed pesticide residue as high as 69% in a batch of medical marijuana. it's one of the things that concern mainstream doctors about medical marijuana, safety as well as uniformity and reliability. >> the major issue that physicians have is in the consistency of the product. how do you know what th...