The world needs “early, aggressive and sustained” government intervention to cut aviation emissions if Paris Agreement temperature goals are to be met, a think tank said Thursday. Airlines must start to slash emissions before the end of the decade and by 2025 if possible, said the International Council on Clean Transportation (ICCT) in a new report. The 2015 Paris climate treaty enjoins nations to cap global warming at “well below” two degrees Celsius, and 1.5C if possible. Earth’s average surface temperature has already risen 1.2C above preindustrial levels. To project aviation sector emissio…