“While many large dams in North America deliver invaluable services—like critical water supplies, clean hydroelectric power, reduced flood risks and recreational opportunities—many more no longer serve their intended purpose and create serious safety and environmental concerns. Globally and in the United States, dams and levees are among the greatest threats to river and wetland health and resilience. ”
Read more here:
https://www.nature.org/en-us/what-we-do/our-priorities/tackle-climate-change/climate-change-stories/removing-barriers-river-health/?src=s_fbo.ch_me.x.x.&sf104717455=1&fbclid=IwAR3lXVtQmhQGmk_Mzbhpa-7192S4l86nH4z7NxAit9HgvMZuDWnN8yXnP_U