Catalytic converts

More suicide fun today, with the discovery of RE Kendall’s proposition in The Lancet (1998; 352:1525) that the advent of catalytic converters on cars has reduced the incidence of suicide by carbon monoxide poisoning. In response, PA Toseland (1999; 353:244) suggests

we should remember that when town gas was converted to carbon monoxide-free gas, the number of people who jumped in the canal, went up.