A mountain pine beetle infestation that has already killed off billions of trees in British Columbia is threatening to take over Alberta's jack pine, marking the start of a deadly cross-country trek. Each mountain pine beetle is the size of a grain of rice, but the voracious insects have already devoured an area of B.C.'s forest the size of Iceland. Another two million hectares in Alberta are now at risk, and the infestation could spread to Canada's boreal forest. "It likes all pine species and we've recently discovered this includes jack pine, which is a component of the boreal forest,"...
