Wind and Solar Are Intermittent Sources of Energy, Right?

"We need to be investing massively in upgrading our grids," he says. "You can't shut down your nuclear plant and build wind and solar." Nuclear is the best at around 92% maximum capacity, but we don't want to rely on coal or natural gas for power. There's research in the works that could allow the number of potential locations for geothermal to dramatically expand - if it really comes to fruition.