When you hear the word “boom” in the West, you usually think of the energy industry. But in the last 15 years, there’s been another kind: a timber boom. That’s thanks to the mountain pine beetle, a tiny ravenous bug that’s now chomped its way through over 40 million acres of forest in the U.S., moving north into Canada, expanding its reach as the climate warms. To clean up all that dead wood, forest managers have turned to the timber industry, leading to a surge in jobs and enterprise. But now, the bugs have almost eaten themselves out of food.