 Environmental groups dispute the economic benefits that are claimed for air transport , and the OEF reports have been specifically challenged . The Aviation Environment Federation ( AEF ) , publishing the Rebuttal of Oxford Economic Forecasting Report , has labelled the 2006 OEF report " biased and misleading " . AirportWatch , an umbrella movement for national environmental organisations and airport community groups opposed to aviation expansion , has produced a critique of the 2006 OEF report and the DfT ’ s reliance on economic research that has been " … sponsored by the aviation industry . " In response to government policy supporting further growth in aviation , Friends of the Earth ( FoE ) published Pie in the Sky in September 2006 . This study concludes that the economic benefits of aviation have been exaggerated , and that the costs arising from environmental damage , as well as to other sectors of the economy , are ignored . Also published in 2006 , the Environmental Change Institute study Predict and decide - Aviation , climate change and UK policy re @-@ examined the economic arguments made in favour of aviation , concluding that restricting future growth would not necessarily be detrimental to the economy , and could potentially result in some economic benefits . 
