The chief executive of the Committee on Climate Change (CCC) has said that the aviation industry is not "off the hook" when it comes to reducing CO2 levels. David Kennedy said that the plan to cut emissions of greenhouse gases by 90% is "extremely challenging" and will only be me by more efficient aircraft, the use of biofuels and constraining the growth in demand. The CCC has said that households and motorists will have to make bigger cuts in emissions than previously estimated -- to allow people to continue to fly.

Brian Wilson, from the aviation industry coalition Flying Matters, said that it was "hugely challenging" to say that aircraft emissions in 2050 should be the same as those in 2005, when it is estimated that there will be three times as many air travellers. And he added that it was "unrealistic" to tell developing countries that they cannot use air freight to deliver their agricultural crops.