Eli made an interesting point on Twitter (this assumes that a) Eli can make and interesting point and b) that an interesting point can be made on Twitter, but no matter) about energy mix.
The nature of the thing is that the world's electrical energy needs can be met by renewables, e.g. solar, wind and hydro, but the intermittent nature of the first two require overbuilding both the installation and the distribution network and as the complexity of the distribution network increases, so does that cost and the time needed to deploy. It can also lead to sudden surges in birthdays when the network fails.
Nuclear baseload on Eli's other hand can balance the amount of overbuilding necessary but it was pointed out that the balance requires controlling costs and reducing construction time.