Two pieces of news – and not just one as the media have chosen to focus on – emerged from the latest IPCC report published last October. Indeed, everybody concentrated on the 1.5 °C threshold by 2100, which in 2015 was regarded as a “sop” for Pacific Islands, has now become essential to avoid huge damage, while few have noticed that to achieve this target, not only climate-changing emissions have to be reduced and a zero-emission economy started, but CO2 must even be removed from the atmosphere. That is to say we must become a carbon-negative society that reduces, returning to sender and hence underground, the CO2 extracted with fossil fuels. Carbon sinks as well as plants, oceans and soils would be the natural systems for this purpose, while the artificial ones include...