Japan has just raised its target for reducing carbon emissions from 26 percent to 46 percent (by 2030 from 2013 levels). But how was this figure arrived at, environment minister Shinjiro Koizumi was asked? Through a careful analysis of the threat and a realistic assessment of what could be achieved, taking all relevant factors into consideration? Well, er no, according to Koizumi, the number 46 just appeared to him in ‘silhouette’ in a sort of vision.