As the COP26 summit wrapped up in Glasgow, leading climate scientist Professor Simon Lewis gave his verdict on our chances of ‘keeping 1.5 alive’: ‘It has a pulse – but only just’.

Campaigners felt the same way. The Glasgow climate pact made important progress – countries pledged deeper carbon cuts and left the door open for more – but it was far from the rapid step-change needed to keep our climate within the safe limit of 1.5 °C warming.