Major U.S. carriers may be required to buy permits for carbon emissions, according to a list released Wednesday by the European Commission. Under the European Emissions Trading System (ETS) scheduled to take effect in 2012, each individual country will sell the permits to those airlines -- both foreign and domestic -- that most frequently use its airports. Experts say countries like Britain and France could earn big revenues from the program because their airports serve so many foreign operators. U.S. government officials have repeatedly fought against the EU ETS scheme, arguing that it violates international civil aviation laws.
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