Solar geoengineering in wrong hands could wreak climate havoc, scientists warn

Blocking the sun may reduce global heating - but rogue actor' could cause drought or more hurricanes, report finds

Solar geoengineering could increase the ferocity of North Atlantic hurricanes, cause the Amazon rainforest to die back and cause drought in parts of Africa if deployed above only some parts of the planet by rogue actors, a report has warned.

However, if technology to block the sun was used globally and in a coordinated way for a long period - decades or even centuries - there is strong evidence that it would lower the global temperature, the review from the UK's Royal Society concluded.