Seems the domed city meme has been enjoying popularity lately.
http://www.hplusmagazine.com/articles/politics/doomed-dome-future-never-was
Pulled quote:
One night in 1979 a group of its creative young city planners went to dinner and Mark Tigan, then the city's 32-year-old director of community development and planning, decided that not enough attention was being paid to energy conservation. Then, in the way that only a few glasses of wine can facilitate brainstorming, someone said, half tongue-in-cheek, they should put a dome over the city.
The next morning it still seemed like a good idea -- or, at least, not necessarily completely absurd.
End quote
-- R Flowers