Empire of the beetle : how human folly and a tiny bug are killing North America's great forests / Andrew Nikiforuk.

"Beginning in the late 1980s, a series of improbable bark beetle outbreaks unsettled iconic forests and communities across western North America. An insect the size of a rice kernel eventually killed more than 30 billion pine and spruce trees from Alaska to New Mexico. Often appearing in masses larg...

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