Most common non-fossil fuel source, the other sentences still stand without issue. There are huge environmental issues with damming rivers, and the costs are 5-10 times that of a nuclear reactor.
EDIT
And to be clear: I am against using fossil fuels with emissions for electricity generation. If nothing else, we have had the technology to support peak power consumption without fossil fuels for a long time and that article does show that it’s not an actual issue. I currently have 100% wind power electricity (though I suspect peak energy still comes from natural gas and they don’t have to report it), and it’s fractions of a penny more expensive than the cheapest energy plans. There’s basically no excuse.
On top of that, I want the government to invest hundreds of billions of dollars into infrastructure projects around the country. I’m a big advocate of building more hydroelectric plants, they just have been pitched as somewhat magical in recent years when there are major concerns with them.
