Christian Science Monitor: When it comes to finding new ways to cut emissions, the skys the limit. As early as Friday, the US Environmental Protection Agency will announce its finding that airline emissions harm human health by exacerbating climate change. Then, under the Clean Air Act, EPA will have the authority to issue new regulations slashing airline industry pollution. EPA told the Monitor Wednesday that its airline findings will be posted online for comment after they have gone through interagency review, but EPA...