With the era of building big dams over in the U.S., a growing number of existing dams are being modified to produce hydropower. These projects, advocates say, avoid the damaging impacts of new dams and could generate enough renewable electricity for several million homes.
Lostine, the new short film from Shane Anderson and the nonprofit Pacific Rivers, highlights the powerful story of collaboration between the Nez Perce Tribe and Woody Wolfe, a sixth-generation rancher in Wallowa, Oregon.
Every year American Rivers ranks the country's 10 most endangered rivers to highlight where imminent threats to human health, safety and survival could be resolved through decisive political, business and community measures.
Lack of a current, national rainfall database means some states are using outdated data - some as much as 60 years old - as they design new roads, bridges and dams. That's a dangerous problem as the climate changes.
While earthquakes still loom as the greatest threat to California's massive collection of dams, experts warn that these aging structures will be challenged further by a new and emerging hazard: "whiplashing shifts" in extreme weather due to climate change.