A disease that could have a devastating impact on forests across Northern California is spreading at an alarming pace.

And as KCBS Radio's Dan Mitchinson reports, it can kill a tree in a matter of months.

<p>A disease that could have a devastating impact on forests across Northern California is spreading at an alarming pace.</p>
<p>And as KCBS Radio's Dan Mitchinson reports, it can kill a tree in a matter of months.</p>

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