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One scheme called for two-mile-diameter spheres of 5000 inhabitants, moored or floating freely in the air. (At about one-half mile in diameter, geodesic spheres are lighter than the air they contain, and so will float like helium balloons.)
Some cities were to be under water, immune to storms, and served by equally
immune submarines. Other cities were drawn afloat on the surface, too large
and strong to be damaged by storms. Anchored offshore, free of inflated
land prices, they offered energy-efficient, inexpensive housing near coastal
Bucky also called for enormous transparent domes over entire cities. Some were to be built from scratch as controlled environments. Others would be a retrofit: He audaciously drew a dome over midtown Manhattan, noting that a few years without snow removal costs, together with the great increase in thermal efficiency and improved air quality, would easily pay for it.
But domed institutions, co-housing, neighborhoods, or even small towns probably
hold the most promise. The controllable climate would permit year-round
food raising. Protected from weather, houses could be lightly-built, and
would last much longer. Because of air currents occurring naturally in a
dome, heating and cooling costs would be low or nil, depending on he climate.
A sense of community might be enhanced.