EurActiv: A directive incorporating aviation into the EU emissions trading scheme (EU ETS) entered into force today (2 February), obliging member states to put in place appropriate legislation within a year. All flights landing or taking off from EU airports will have to buy CO2 allowances under the bloc’s cap-and-trade system under the new directive. Trading officially begins in 2012, while member states have a year to transpose the directive into national law. Furthermore, each carrier …