Congress chose Yucca Mountain as the leading candidate for nuclear waste disposal. But opponents are concerned about contamination, and the Obama administration said it would not consider the site and would look for alternatives. It won a legal battle when a federal appeals court ruled last week against three states seeking to ship spent fuel to the Nevada site. (Associated Press)

Congress chose Yucca Mountain as the leading candidate for nuclear waste disposal. But opponents are concerned about contamination, and the Obama administration said it would not consider the site and would look for alternatives. It won a legal battle when a federal appeals court ruled last week against three states seeking to ship spent fuel to the Nevada site. (Associated Press)