Green Energy

It sounds like you underestimate just how temputure dependent many types of salmon are and just how short of a time they have left to live in a 2C+ world. Many of their spawning locations are also in areas that are seeing the highest relative temperature change.

aThe point was that climate change is going to kill more salmon and vastly more other types of marine life than a handful of dams, but thouse few dams could have a significant effect on the amount of carbon emitted by the second largest polluter on earth by providing the nighttime energy that is currently done with dozens of brand new natural gas plants. With the way solar in particular is scaling up, dispatchable energy storage is going to be the primary limiting factor on how hot things get, and therefore how many species of salmon are going extinct in our lifetime.