Net in hand, Louis Reuben waded into the frigid waters where his ancestors once fished, long before Idaho’s rivers were dammed and contaminated, before the Nez Perce were driven off their land when white miners struck gold.

"They used to say you could walk across the river on the backs of salmon,” he said one rainy autumn morning as he tallied and measured the depleted stocks of young Chinook salmon that hatch in these mountain creeks. "Now, it’s totally different. It’s devastating, if you think about it.”

U.S. President Joe Biden came into office vowing to safeguard Native American resources like these and uphold the rights of tribes that have endured generations of land theft and broken treaties. But in the rolling headwaters of central Idaho, where mining interests have long overrun tribal rights, the administration’s promise is colliding with one of its other priorities: starting a revolution in renewable energy to confront climate change.