Globe and Mail: You won’t have trouble finding a pint-sized grand fir on a Christmas tree lot this time of year – it’s one of the most popular yuletide evergreens on the market. But tree experts on southern Vancouver Island fear climate change is threatening the giant conifer’s survival in the wild. Chris Paul, an arborist with the Municipality of Oak Bay, said his staff have had to chop down dozens of dying grand firs in recent years, something that in past decades rarely …