Generation methods that destroy key ecosystems of threatened and endangered species is not what I’d call “clean”. We can do so much better than dams, getting rid of them in place of actual green power would be an incredible, healing boon to these major rivers and the ecosystems they support.
Sadly all power generation methods come at a cost. What would you suggest?
Wind and solar. They have downsides, like they all do, you’re right, but they don’t obliterate sensitive ecosystems of threatened species. The downsides to nature are significantly reduced with wind and solar. Tidal looks good too, but I don’t know enough about it to give it the official "Some Random Guy on Lemmy Stamp of Approval ".
I’m no expert so I don’t know what causes more damage, but the production of photovoltaic cells also is by no means environmentally friendly. People die, ecosystems get destroyed, …
And people argue that birds fly into wind generators and die, idk how much damage that is comparatively but probably the least. So from an environmental perspective, as a layman, I’d rank them wind > water > sun > non-renewables (nuclear > gas > coal).
But wind (and sun) always changes, so it’s impossible to only have wind (and sun). You need:
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Something stable that carries a large percentage (for example water in rivers or at the end of lakes (so basically at the start of a river)).
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Something flexible that can quickly be increased or decreased (for example pumped hydro storage power stations, bonus points there for also being able to use energy when there’s too much wind/sun; or non-renewables (burn more gas, get more electricity))
So even if we assume that wind and sun are better than water we still need either water or non-renewables. I’d say that’s an easy choice.
Large hydropower is not counted as “Renewable” by California. We have renewable portfolio targets, and we import a lot of wind power from the north to meet the standards.