International Herald Tribune: Five countries that created a treaty nearly four decades ago to protect polar bears through controlled hunting issued a statement Thursday that called climate change “the most important long-term threat” to the bears. The statement came in Tromso, Norway, at the end of a three-day meeting of scientists and officials from Canada, Denmark, Norway, Russia and the United States, all with territory abutting the Arctic Ocean that serves as habitat for the bears. (Denmark was represented …