How much are each of those contributing? They don't know. They can't make any predictions about what effect changes will have. The link between temperature and fish numbers didn't pan out a few years ago here in the PNW when water temperatures were higher but we had a boom year in salmon numbers.

If it's really serious let's get the gill nets out of the rivers and let the numbers rebound. But that's never on the table; just taxpayer's billions for destruction of carbon-free electricity.