
Particles in the ship’s exhaust inadvertently cause the clouds to glow; some geoengineering projects would try to recreate this effect.
NASA’s Earth Observatory
How would the world react if one country launched a solar geoengineering project to cool the planet without the consent of others? Would the sky change color depending on the type of particles injected into the upper atmosphere? The answer is that even if global average temperatures would cool, how would rainfall in Africa change? These are some of the questions faced by solar geoengineering scientists at the December meeting of the American Geophysical Union (AGU) in Washington DC, and these…