Lago Gris, ChileProvided / Guy Wenborne LAKE TAHOE, Calif. / Nev. — It’s not every day that a small mountain community in the Sierra Nevada helps shape environmental conservation efforts on the other side of the world. But that’s exactly what happened when three Chilean conservationists began searching for a model to protect their country’s rapidly changing lake region. When Fernando Coz, Angela Delorenzo and Cristóbal Valenzuela recognized the …