Globe and Mail: In a single season, an army of pine beetles has transformed our allies in the battle against climate change into the enemy. Now the province is in a race against nature, as one billion beetle-killed trees across the province slowly seep the greenhouse gases they had so generously stored up in their decades of growth. Such a turnaround seemed unimaginable back in February, 2008, when Premier Gordon Campbell first seized on the value of B.C.’s forests in his campaign against …