[hawtkey]

Beaver dams are a good example of this too. Beavers were building bioswales everywhere in North America for free and we killed almost all of them and wore them for hats.

https://www.ewu.edu/cstem/stories/the-ecological-benefits-of...

[worldsayshi]

Which makes me wonder how much carbon we can sequester per reintroduced beaver. Wetlands are apparently very good carbon sinks.