Geoengineering may be used to combat global warming, experts say

IPCC authors suggest there is high agreement that injection of chemicals into stratosphere could help limit rises

• Full report: We have 12 years to limit climate change catastrophe, warns UN

The world may increasingly look to geoengineering in the wake of the latest UN climate report, which says it could be adopted as a temporary "remedial measure" if the world heads towards dangerous levels of warming.

The authors of the new 1.5C study by the Intergovernmental Panel on Climate Change say there is high agreement that the injection of millions of tonnes of sulphur dioxide into the stratosphere could help limit temperature rises to the most ambitious target of the Paris accord.