Why the U.K. is betting $76 million on solar engineering to help cool the planet

The climate crisis is worsening. Last year was the warmest on record, global sea ice levels are at a record low, and the economic toll of extreme natural disasters continues to mount.

Just this week, the World Meteorological Organization said the global average temperature is likely to rise nearly 2 degrees Celsius above pre-industrial levels within the next five years, with “growing negative impact on our economies, our daily lives, our ecosystems and our planet.” Experts are adamant...