Dead trees are fueling California wildfires, but what's killing the trees?
http://www.kalw.org/post/dead-trees-are-fueling-california-wildfires-whats-killing-trees#stream/0
The devastating October 2017 wildfires in Northern California were the worst in the state’s history, and fire scientists expect more of these extreme blazes to become the norm. Millions of dead trees turn forests into tinderboxes. And many of those trees were killed by one tiny culprit — the bark beetle.
These native pests chew their way through evergreens, sometimes cutting through 100,000 trees in a day. There are currently more than 100 million dead trees in the state, waiting to fall or burn. And while official policy is to clear and sell the dead trees, some ecologists question that logic.
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