Last week, the European Union proposed extending an exemption of international flights from emissions limits. The exemption was set to end at the beginning of 2017, but may not be enacted for at least another four years. The EU had tried to include international flights in its emissions trading system (ETS) in 2012, but was met with backlash from non-EU countries who said the deal violated their sovereignty. The delay was welcomed by the International Civil Aviation Organization, which supports a global market for offsetting emissions from international aviation that would not be mandatory for another decade, but was met with criticism from environmental organizations. For the full story, see http://uk.reuters.com/article/uk-eu-carbon-aviation-idUKKBN15I1IV.