But electrofuels also have a downside: They’re very expensive. You need hydrogen to make them, and as I mentioned in chapter 4, it costs a lot to make hydrogen without emitting carbon. In addition, you need to make them using clean electricity—otherwise, there’s no point—and we don’t yet have enough cheap, clean electricity in our power grid to use it economically for making fuel. It all adds up to a high Green Premium for electrofuels:
