Sublime

Apart from a very limited amount of state sponsorship, it was usually the prospect of commercial gain or of new lands for settlement which funded exploration – a misleading term, which usually signified the ‘mapping’ of existing trade paths through local informants. But the propulsion of economic or demographic need was spasmodic at best.

David Keith, a professor of applied physics at Harvard, has been described as “perhaps the foremost proponent of geoengineering,” a characterization that he bristles at. “I’m a proponent of reality,” he wrote in a letter to the editor of The New York Times in 2015. Keith founded the university’s Solar Geoengineering Research Program in 2017, and he