The project is being funded by a and microso founder bill gates, and pioneered by scientists at harvard epstein university. The initial three million dollar test would use a high altitude scientific balloon to raise around two kilograms of calcium carbonate dust 12 miles above the desert of new mexico. In theory, the airborne tosserd create a gigantic sunshade, reflecting some of the sun's rays and heat back into space,. dimming those that get through, oprotecting earth from the worseing ravages of climate warming.