Summary Box: EU will talk, won't scrap carbon tax

CAN WE TALK? Europe is willing to discuss its new carbon emissions tax for airlines but has no plans to scrap the levy.

CLEARING THE AIR: Under the system, airlines flying to or from Europe must obtain certificates for carbon dioxide emissions. They will get free credits to cover most flights this year but must buy or trade for credits to cover the rest.

AIR PRESSURE: Airlines say the tax is too costly. Industry leaders warn the disagreement could spark a trade war. The European Commission transport commissioner said at an aviation conference in Singapore that the EC isn't "trying to dominate the world."