Well like I said, it doesn't matter who is right or wrong. There is a worldwide movement to reduce carbon emissions and it will have an effect on private aviation. I think it has the potential to have more of an impact than any recession, which this thread was originally started for. The fact that sustainable fuel and carbon offsets exist helps mitigate the extremists, like the ones in France that Geewiz mentioned.

It would tough to argue that private aviation contributes to global warming if its "carbon neutral." Science turns into math at that point.