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40% of US electricity is now emissions-free
(arstechnica.com)
This is a most excellent place for technology news and articles.
Why? Nuclear power is the most complex and expensive option of any clean energy source from what I know.
Nuclear power is good for its consistent output that is independent of outside factors like wind, clouds, or drought. Plus much of the cost of nuclear is tied with the construction of the plant not the operating costs, so a paid off plant isn't particularly expensive.
Don't leave out the deconstruction of old nuclear plants after their operational time and the storage of radioactive waste. It's very laborious and expensive.