National Geographic: As another nuclear power plant closed this week, the United States faced a dwindling fleet of aging reactors, few new projects, and the challenge of safely mothballing radioactive fuel for decades.
Almost all its nearly 100 remaining reactors will be more than 60 years old by 2050. Their owners will have to decide whether the investments needed to keep them running are worth it, given the influx of cheap natural gas that has reshaped the U.S. energy economy.
So far, nuclear isn't winning. Vermont...