[prolepunk]

Flooding, especially when building hydro in flat areas.

Earthquakes -- there is some causality

Destruction of fish habitat -- salmon in Columbia river

In general, making water go slow when it used to go fast has a lot more negative consequence for the environment than one might expect.

I find this episode of 99 percent invisible to be really informative -- https://99percentinvisible.org/episode/fish-cannon/