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I don't think anyone opposes hydropower due to reservoirs, the concern is lifecycle species like salmon that are born at the headwaters of rivers, live their ad

I don't think anyone opposes hydropower due to reservoirs, the concern is lifecycle species like salmon that are born at the headwaters of rivers, live their adult life in the ocean, and return to headwaters to reproduce. Dams get in the way, and the kill rate of dams even with ladders is enormous. The other big concern I see is access, e.g. canoeing or kayaking rivers, destroying fishing spots, culturally significant sites, etc.

AstralStorm 6y ago
There's another thing that destroys rivers: drying out. Not helped with rising average temperatures... On the other hand with enough investment you can build artificial lakes instead. However, current economy does not value the abovementioned things enough to build artificial lakes.