This brings us to a last-ditch protective measure: lowering the world’s temperature by reducing the amount of solar radiation that reaches the lower atmosphere and Earth’s surface.104 A fleet of airplanes could spray a fine mist of sulfates, calcite, or nanoparticles into the stratosphere, spreading a thin veil that would reflect back just enough sunlight to prevent dangerous warming.105 This would mimic the effects of a volcanic eruption such as that of Mount Pinatubo in the Philippines in 1991, which spewed so much sulfur dioxide into the atmosphere that the planet cooled down by half a
...more
Yikes. Worry about uninftended conseqjences
