Anyone with a fear of flying, or maybe a fear of polluting and wasting
energy perhaps?

"Airlines are being urged to implement new safety measures for long-
haul aircraft after investigators found that the crash-landing of a
Boeing 777 at Heathrow was probably caused by ice in its fuel system.

The previously unknown problem was revealed in a report into the
accident on 17 January involving a British Airways flight from
Shanghai. The Air Accidents Investigation Branch is urging European
and US regulators to introduce interim measures for all Boeing 777s
powered by Rolls-Royce Trent 800 engines to prevent a similar
incident.

It also wants the aviation industry to ensure that fuel systems can
cope with the potential build-up and sudden release of ice. The
findings could result in long-haul flights being made to fly at lower
altitudes to prevent the build-up of ice crystals inside their fuel
tanks..."

More:

http://www.independent.co.uk/news/uk/home-news/safety-fears-over-longhaul-flights...