"Widely spaced earth-sheltered towns offer sweeping views over the plains. High-speed trains link the communities. Food is grown in the region. Bikeways are everywhere. Nonpolluting hydrogen powers all vehicles. Sunlight and wind generate the hydrogen. Note the earth-covered bridges, the continuous window bands, the wind machines across the farmlands. In this new America, everything is reused, recycled, conserved."

Source: Source: www.msnbc.com