(GOOGLE) — World aviation bosses warned on Monday of a potential trade war over a carbon tax imposed by the European Union, which expressed readiness to compromise while insisting on its environmental agenda.

In a conference on the eve of the Singapore Airshow, one of Asia’s largest aviation trade fairs, representatives of the airline and plane manufacturing sectors expressed concern over a potential political and economic standoff.

“I have to say I’m really worried, also as a manufacturer, about the consequences,” said Airbus Chief Executive Thomas Enders.

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