Please note shortwave albedo of Earth has large spatio - temporal variations, but its annual global average is restricted to a narrow range, even if it is not determined by simple material constraints, but by an intricate interplay between many internal degrees of freedom. (realclimate.org)
I had the idea to put micronized CaCO3 on the surface of the oceans primarily to increase the global albedo of the Earth. (realclimate.org)
Clouds and other factors, like aerosols and black carbon, also influence the albedo of Earth. (sciencedaily.com)