I have read that studies report that approximately 27% of the UK smokes marijuana regularly.
people sell cannabis to ake money of course, almost all cannabis sellers smoke the substance themselves. by selling cannabis it can allow them to smoke more weed then they normally would for almost free. also atleast in Canada selling weed really isn't a difficult thing to do so if your asking why its to make money, same reason people sell any drug
No. You are either diagnosed with it at birth or you don't have it. But if you smoke while pregnant, you could be putting your baby in danger. I have three friends who smoked cannabis either for years before being pregnant or during pregnancy and all three had children with Asperger's Syndrome. It isn't a research study, by any means - but it is 3 for 3 in terms of people I know who had smoked cannabis regularly.