Stands of dead and dying trees are seen in a valley in the Sierra Nevada mountains from a helicopter tour Tuesday, Dec. 1, 2015. Mostly ponderosa and sugar pine trees are dying off in large numbers throughout the Sierra Nevada due to a bark beetle infestation brought about by four years of extreme drought in California.
Stands of dead and dying trees are seen in a valley in the Sierra Nevada mountains from a helicopter tour Tuesday, Dec. 1, 2015. Mostly ponderosa and sugar pine trees are dying off in large numbers throughout the Sierra Nevada due to a bark beetle infestation brought about by four years of extreme drought in California. CRAIG KOHLRUSS ckohlruss@fresnobee.com
Stands of dead and dying trees are seen in a valley in the Sierra Nevada mountains from a helicopter tour Tuesday, Dec. 1, 2015. Mostly ponderosa and sugar pine trees are dying off in large numbers throughout the Sierra Nevada due to a bark beetle infestation brought about by four years of extreme drought in California. CRAIG KOHLRUSS ckohlruss@fresnobee.com

Valley Voices

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