Business Green: The government has this week referred a legal challenge from a group of US airlines against their planned inclusion in the European Emissions Trading Scheme (ETS) to the European Court of Justice, vowing to vigorously contest the case and expressing confidence that it had a robust defence. Last month, American Airlines, Continental Airlines and United Airlines — backed by the US Air Transport Association (ATA) – formally filed for a judicial review of their inclusion in the ETS in …