Deploying today’s renewables and improving transmission couldn’t be more important. . . . Unless we use large amounts of nuclear energy . . . every path to zero in the United States will require us to install as much wind and solar power as we can build and find room for. . . . [M]ost countries aren’t as lucky as the United States when it comes to solar and wind resources. . . . That’s why, even as we deploy, deploy, deploy solar and wind, the world is going to need some new clean electricity inventions too.