Canada's role in an arid future

"Severe Drought Has U.S. West Fearing Worst" - front page headline, New York Times, Sunday, Feb. 1 Ayoung couple on the Canada Line asks for directions to the airport. They are flying home to San Francisco after a week skiing in Whistler, despite the fact there was not much snow. "But there was more snow in Whistler," the man says, "because there's none in Tahoe."