Another episode from the book:
"The higher the use, the greater the risk. In other words, marijuana in the United States has become increasingly dangerous to mental health in the last fifteen years, as millions more people consume higher-potency cannabis more frequently. Yet cannabis advocates will not concede the issue. They argue cannabis use has risen since the 1960s, while psychosis has not. “Rates of schizophrenia and other psychiatric illnesses have remained flat even during periods of time when marijuana use rates have increased,” the Drug Policy Alliance claims. In reality, crucial and largely unnoticed data and research suggest otherwise. Finding out how many Americans had a heart attack or were diagnosed with cancer last year is easy."