Eventually someone may crack the nuclear nut. It could be two, ten, or 200 years away. We have to make some immediate headway in reducing fossil fuel use. I'd be okay with it if some fossil fuel powered plants ran a few hours at night to make up the difference.

But why are they running at all during the day when solar and wind could make all we need?

Just a thought... West Virginia's collapsed economy was based on coal mining, they have vast pieces of land destroyed by coal mining. Even more vast pieces of land owned by mining companies that will never be mined.

Let's cover those acres with solar panels and a few wind turbines on top of every mountain that's been blasted flat. The entire state could become a power plant and the coal miners would build and maintain the system...Solar mining as it were...

Again, Gates' money would be better spent on real green projects.
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"Be yourself; everyone else is already taken."— Oscar Wilde