Re: Advantages
"From a UK perspective, our airline fuel use is equal to about one third of the fuel use of all UK road vehicles."
From a global perspective this is a much bigger problem:
http://www.industrytap.com/worlds-15-biggest-ships-create-more-pollution-than-all-the-cars-in-the-world/8182
That's just 15. A lot more where they come from.
To keep a global economy running it is one that needs fixing sooner rather than later.