Did you know by a clinical standard of proof, no one has ever proven that cigarettes cause lung cancer? It's done by epidemiological studies over decades, so there's probably no way to prove by a clinical standard that marijuana causes lung cancer or other cancers.
It's going to have to be done over decades. So what happens to all the people who are smoking marijuana now, when they find out later, as we found out with asbestos and tobacco, that it leads to cancers later in life?
I want to ask you about one other study, although I don't have the name of it. It's a study in the U.S. on criminals in prison for a whole range of crimes, including violent crimes. They found that I think 40% of them were smoking marijuana when they committed their crimes. Are you familiar with that study?