What could be more agreeable? Oodles of electricity free of charge and free of carbon.
Two big claims are made for solar and wind energy. One is that it is cheap. However, as this column observed last week, this claim ignores the costs of all the back-up required to keep the power on when there is no sunshine or wind.
The other claim is that solar and wind energy is “greener” - that is, cleaner, - than fossil fuels. This ignores even more contrary evidence than the renewables-are-cheapest claim. Sun and wind may come out of the sky, but the machinery to turn them into energy does not. That machinery requires mining, manufacture, and transport.
Vast expanses of land have to be turned into energy farms. Huge quantities of minerals have to be dug up and then transported, mostly across the oceans, to make batteries for energy storage. And when windmills, solar panels, and batteries have worn out, they have to be disposed of.
Because they are available only intermittently, solar and wind cannot be relied upon for the mining, manufacture, and transport of windmills and solar panels. So conventional fuels must be used. “Clean” energy systems accordingly require fossil fuels not only as backup, but cannot even be built or installed without them. Using efficient energy to help the sun and the wind provide inefficient energy is not much of a bargain for anyone other than those, prominent among them Elon Musk, involved in the supply of renewables.
Even the ever green Economist admits that wind and solar power need “a lot more” of some non-ferrous metals than do fossil fuels. Batteries store less energy than fossil fuels, while building the infrastructure to support them is a “huge task”.