Agence France-Presse: Russian Prime Minister Vladimir Putin, better known in the West for his tough-guy image, expressed concern Thursday for the fate of Arctic polar bears threatened by climate change. “The polar bear is under threat. Their population is currently only 25,000 individuals,” Putin was quoted by Russian news agencies as saying after a recent trip to an island in the Arctic Ocean. Although Putin is better known in the West for pushing a muscular foreign policy and tightening control …