Stardust Solutions is a for-profit startup based in Israel that plans to cool the planet with harmless fine particles released in the stratosphere. The company published six technical papers detailing its plans. The primary component of the particles is proposed to be amorphous silica, which, in contrast to crystalline silica, is claimed to be harmless to animals and plants at the levels dispersed. To deliver the particles, the company would develop new high altitude cargo planes.