Roadmap Sets Sun-Dimming Path

San FranciscoNonprofit Reflective wants sulfur dioxide released into the stratosphere to test cooling it.

Stopping the technique abruptly triggers rapid rebound warming, and models disagree most on South Asia’s monsoons.

The roadmap’s full path, ending in a 25,000-ton release, would take 20 years and $1.4 billion if uncoordinated.

Wageningen’s Aarti Gupta asks who would control a technology whose costs fall on countries with no say.

Sources: MIT Technology Review