Why 1.5°C failed and setting a new limit would make things worse
Climate change has already led to more frequent disasters, such as the recent floods in Mozambique Associated Press/Alamy More than a decade on from the 2015 Paris climate conference, it is hard not to feel that we have, at best, been treading water on climate action. Sure, there are plenty more electric vehicles on the road and, globally, renewables now produce more electricity than coal. But we continue to pump out more than 41 gigatonnes of carbon dioxide every year, while fossil fuel companies plan for expansion and governments row back on green measures. There was real optimism in Paris, as countries pledged to pursue efforts to limit the global average temperature increase to 1.5°C above pre-industrial levels. Ten years on, this ambition is, to all intents and purposes, dead in the water. Such is the mechanism used for defining when our world breaches 1.5°C, however, that the year this happens is likely to be officially confirmed only in 2040 or thereabouts – a decade after it actually occurs. The 1.5°C mark has been conflated …

