Agence-France Presse: Countries could speed up their action against climate change if they tackled air pollution as well as carbon dioxide emissions, the UN Environment Program says. UNEP executive director Achim Steiner says there’s strong evidence that the world’s climate is changing faster than initially expected, adding to the urgency for concrete measures against global warming. “It is… becoming clear that the world must also deploy all available means to combat climate change,” Steiner said …