Overemphasis on innovation and carbon removal risks distracting from main goal of stopping use of fossil fuels, say scientists. Machines to magic carbon out of the air, artificial intelligence, indoor vertical farms to grow food for our escape to Mars, and even solar-powered “responsible” yachts: the Cop28 climate summit in Dubai has been festooned with the promise of technological fixes for worsening global heating and ecological breakdown.

The UN climate talks have drawn a record number of delegates to a sprawling, freshly built metropolis, which has as its centrepiece an enormous dome that emits sounds and lights up in different colours at night. The two-week programme is laden with talks, events and demonstrations of the need for humanity to innovate its way out of the climate crisis.