The Guardian covers Greg Asner's work assessing condition of California's forests

 “It’s like going in and getting a blood test, and the doctor saying you’re OK or you’re not,” Greg Asner tells The Guardian of his Carnegie Airborne Observatory team's monitoring of drought-stricken forests in California. “The only time I’ve seen it this bad is in the Amazon in 2010, when I mapped millions and millions of dead trees." More