Those who fly or are planning to fly to Europe nowadays will find that there is a heavy tax to pay loosely called environmental fees. European rules forcing all airlines to pay for carbon emissions are within the law, an adviser to Europe’s highest court said on Thursday (October 6), in the latest stage of a bitter battle between the European Union and the aviation industry. From January next year, all airlines will have to buy permits under the EU’s emissions trading scheme (ETS) to help cover the carbon cost of all flights that land or take off in Europe.