‘Grownup’ leaders are pushing us towards catastrophe, says former US climate chief

Political leaders who present themselves as “grownups” while slowing the pace of climate action are pushing the world towards deeper catastrophe, a former US climate chief has warned.

“We are slowed down by those who think of themselves as grownups and believe decarbonisation at the speed the climate community calls for is unrealistic,” said Todd Stern, who served as a special envoy for climate change under Barack Obama, and helped negotiate the 2015 Paris agreement.

“They say that we need to slow down, that what is being proposed [in cuts to greenhouse gas emissions] is unrealistic,” he told the Observer. “You see it a lot in the business world too. It’s really hard [to push for more urgency] because those ‘grownups’ have a lot of influence.”

But Stern said the speed of take-up of renewable energy, its falling cost, and the wealth of low-carbon technology now available were evidence that the world could cut emissions to net zero by 2050. “Obviously it’s difficult – we’re talking about enormous change to the world economy – but we can do it,” he said.

Stern would not name any world leaders, but he said the UK was in “retrenchment” over climate issues. Rishi Sunak and Claire Coutinho, the energy secretary, made several U-turns on climate policy last year, and have repeatedly said climate policies imposed “unacceptable costs on hard-pressed British families” and that by slowing such action they were “being pragmatic and protecting family finances”.

Stern said that, in fact, delaying action to cut greenhouse gas emissions was leading to disaster, given the rapid acceleration of the climate crisis, which he said was happening faster than predicted when the Paris agreement was signed. “Look out your window – look at what’s