lets face it
Shipping creates far more pollution then flying, that's before we get onto the extended pollution caused by producing and maintaining shipping fleets in comparision to maintaining an aircraft.
Also livestock makes more co2 then planes.
Driving creates more pollution, if the country had a 1/5th adequate integrated public transport network we'd more then make up for the extra flying.
The whole pressure on the air industry has only one result stopping poorer people from traveling abroad. It wont effect people with higher wages really, or people on business trips, but it will effect people (working/lower middleclass folk) who want to take the family to disney land.
Production of most "eco-fuels" generally creates more pollution then most non eco fules.
Lets face it we scrap the coal/oil plants and build nuclear, and we implement carbon storage. It's the only way to go, but the crazy hippies don't like that idea. So we'll keep on cruising with lol worthy generally very expensive measures that shall do nothing.
Have "green" taxes stopped people driving? It's a crock of poop, made by hippies who think that living in mud huts and reaching a grand old age of 45 is a great way of life.