BDN: Bad news on the climate front. It was already clear that we are very likely to break through all the "do not exceed" limits and go into runaway warming later this century, because greenhouse emissions have not dropped, are not dropping and probably will not drop. We did have a fallback position, which was to counter the warming by geoengineering -- but now the leading technique for geoengineering also looks like it will not work.
In a paper published this month in Environmental Research Letters,...