While such initiatives are certainly helping to reduce aviation's environmental footprint, however, the rapid growth of the airline industry, with an ever-increasing number of flights catering to an ever-increasing demand for air travel, means that their impact is at best limited.

CNN: Green wing:?can technology make flying more environmentally friendly?

It probably makes more money from its interests in airline catering (in which it owns 20% of world market), ground handling, maintenance and air cargo than it does from actually flying.

ECONOMIST: Flying in circles