From last month. Another popular panic apparently debunked.
Speaking of pot, this is s thought-provoking short piece: "Big dope: how marijuana benefited from one of the slickest PR campaigns in history".
A key question is whether people with problems tend to smoke pot or whether smoking pot tends to cause problems. And while it's at least plausible causality runs in both directions, the widespread approval of modern pot should be researched a bit more than it has.