ITER, the international fusion experimental reactor, will not be completed in 2025 as previously announced. It will be a decade or more late for its goal of making some experiments possible.

This is sad, but it doesn't really change the situation. If fusion power ever works, it will be decades too late to help avoid global heating disaster. We can keep the research going, but our plan to curb global heating should ignore nuclear fusion.

It must also ignore nuclear fission. Although fission reactors do work, they are so expensive that the main effect of building one is to waste the money we could have used to build more solar and wind power.