A flush of cleaned wastewater into the Santa Cruz River has restored a fish and wildlife connection in Arizona's Sky Islands.

POWDER RIVER—Struthers Burt—Farrar & Rinehart ($2.50). Powder River rises in central Wyoming, fed by the snows of the Big Horn Mountains. North it flows, joined by Salt Creek, Dugout Creek ...

A report from the Sierra Club’s Grand Canyon Chapter warns parts of the Upper Verde River could go dry within the next two ...