Daphne Bramham: What is the truth about the risks of marijuana?

Alex Berenson, a former New York Times reporter, set out to scare people with his book about the dangers of marijuana. He makes no secret of that and he’s pretty good at doing just that.
His book, Tell Your Children: The Truth about Marijuana, Mental Illness and Violence, that was released on Jan. 8 is provocative. It may even infuriate you, as it has advocates of cannabis legalization in the United States.
It’s data heavy, drawing on scores of peer-reviewed studies and reports