Earlier quoted context omitted.
Honestly, if the choice is removing the dams and moving to more polluting energy forms, or letting the fish go extinct, I think letting the fish go extinct is the best choice at this time. Maybe we freeze their fertilized eggs and reintroduce them at some point in the future when climate change has been reversed.
You realize in 600ad the temp was a 1 hotter than today. There is no maybe we reintroduce at a later time because whatever you think needs to happen with climate change never will. I would rather you pay more and pay the full costs of your electrical use. Use solar, wind or invest in a nuclear plant if removing carbon is imported. Causing extinction in the name of climate change when really it's about cheaper prices…
Interesting. Do you have a source for this?