On the whole the aviation industry have done a good job over the past decades at reducing emissions. I think the improvement is something like 76% – a figure that few other industries could match.

Of course this is driven largely by the fact that fuel is their biggest expense – if it wasn’t then very little R&D would have gone into fuel efficiency.

If other industries could be motivated to make such improvements over the coming years then we would be half way towards solving our biggest environmental issues..