On the slopes of a volcano in central Mexico, biologist Cuauhtémoc Sáenz-Romero and his team envision a climate refuge for oyamel fir trees and the monarch butterflies that depend on them.
RENO, Nev. (AP) — Conservationists and an advocacy group for Native Americans are suing the U.S. to try to block a Nevada lithium mine they say will drive an endangered desert wildflower to extinction ...