shields for planets such as Venus or Mars would... be large, complex s — Space sunshade

"can be formed into glass for either a transparent or opaque shield."

"The miniature facets are adjusted by hand... It is sufficient to simply let the sun shine on the miniature reflector and then turn the facets so that the reflected light strikes those parts of the globe corresponding to the region to be irradiated."

"The cultural tasks are... possible to fulfill. For example, if a sea route to the ports of Siberia is to be kept ice-free, a route must only be chosen that runs approximately in the direction of the winter wind from the Gulf Stream... light is thrown on a relatively narrow and short strip running from east to west... to the extent that the sky clouds over at this place. ...[T]he direction of the wind and ...the earths rotation coincide. Hereby the earth always rotates as we need it ...By the time the light patch has passed along the whole stretch, the fog at the beginning will either have settled or been blown away... Then one can begin at the beginning again, Since the clouds hold the heat above the shipping lane... a reflector 100 km in diameter is... sufficient."

"Ref: Philander, Medizinische Märchen"

"Approximately 2% of the solar radiation reaching Earth must be blocked to offset the predicted greenhouse trapping in the next century."

"A rocket with the necessary equipment is sent aloft and there given a lateral propulsion which puts it into an elliptical orbit around the earth. I will call this rotation about the earth "revolution". Major axis perpendicular to the ecliptic, perigee in the south 1,000 km above the earths surface, apogee in the north 5,000 km above the earths surface."