Cal Poly professor discusses massive tree die-offs in California

Cal Poly professor Richard Cobb talks about how forests worldwide stressed by drought and heat are dying at an accelerated rate, creating conditions for fire and disaster.
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Cal Poly professor Richard Cobb talks about how forests worldwide stressed by drought and heat are dying at an accelerated rate, creating conditions for fire and disaster.

Mass tree die-offs lead to disaster, and a Cal Poly professor is looking for answers

January 16, 2018 06:30 PM