The UK rejected proposals to use a controversial technique in the Antarctic to deflect some of the sun’s rays, as pressure grows to use geoengineering to curb global warming.
A number of moonshot solutions to cool the planet have gained traction in recent years amid faltering efforts to stem climate change by cutting emissions. Some scientists and entrepreneurs argue that now is the time to explore all options as the risk mounts of surpassing potential climate “tipping points” that could threaten life on Earth.
That’s sparked a debate over whether so-called climate geoengineering — such as spraying reflective particles high ...