A list of retaliatory measures has reportedly been agreed at a meeting in Moscow held by a group of countries opposed to the inclusion of aviation in the European Union's Emissions Trading System (ETS).
Reports quote Russian deputy transport minister Valery Okulov as saying during a news conference in Moscow that each of the 26 nations opposed to ETS - including the USA, India and Russia - will be able to choose "the most effective and reliable measures that will help to cancel or postpone the implementation of the EU ETS."
The agreed retaliatory measures are said to include barring national carriers from participating in the ETS and lodging formal complaints with the International Civil Aviation Organisation (ICAO).
A European Commission spokesman said the Commission has not yet received a full account from the meeting in Moscow, but added: "Unfortunately our questions for the Moscow participants remain unanswered: what are your concrete and constructive alternatives for a global agreement [on addressing aviation emissions] at ICAO?"
The EU will "review its position" on emissions trading the day a global solution is proposed, the spokesman said.