 Critics of an expansionist policy consider the EU ETS to be too late and to price carbon too low to adequately mitigate the climate change impact of aviation emissions . Instead they advocate addressing these impacts by constraining demand for air travel . The study <unk> and Decide - Aviation , climate change and UK policy , noting that a 10 per cent increase in fares generates a 5 to 15 per cent reduction in demand , recommends that the government should seek an alternative aviation policy based on managing demand rather than providing for it . This would be accomplished via a strategy that presumes " … against the expansion of UK airport capacity " and constrains demand by the use of economic instruments to price air travel less attractively . In another study the levying of £ 9 billion of taxes is calculated to constrain the forecast growth in demand by 2030 to 315 million passengers , reducing the annual rate of growth to 2 per cent . The environmental message is echoed in the ninth report of the House of Commons Environmental Audit Select Committee , published in July 2006 , which labels the government strategy a predict and provide model and expresses scepticism about the timescale and efficiency of the EU ETS . It recommends instead that the government rethinks its airport expansion policy and considers ways , particularly via increased taxation , in which future demand can be managed in line with industry performance in achieving fuel efficiencies , so that emissions are not allowed to increase in absolute terms . 
