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“The political moment is now” to address the climate risks posed by the aviation industry, analysts, insiders and campaigners say, as governments across the world weigh up bailouts for airlines grounded by the coronavirus pandemic. Rescue packages need to come with green strings, such as reduced carbon footprints and frequent flyer levies, they warn, or the sector will return to the path that has made it the fastest rising source of climate-wrecking carbon emissions over the past decade.