The nuclear industry is lining up heavy hitters from past administrations to convince Congress and the public that nuclear power represents a solution to climate change. But safety fears post-Fukushima, along with concerns about high building costs and the lack of permanent storage for spent fuel rods, remain big hurdles.
Most people now live in cities, the UN declares, and more will follow, perhaps marking the 21st century as the Urban Era. Why the attraction to cities? Perhaps it shows rising hopes for progress.