I think most people can see that polluting the world (landfill, dumping at sea, industrial waste, etc) is fundamentally a bad thing and that we should do all we can to avoid contaminating the earth, sea and sky.
But, and it's a big one, the climate changers have convinced themselves that this pollution is causing the climate to change based on flimsy evidence.
Politicians are able to win votes by pretending to be green (and at the same time negotiating carbon offsets so their voters don't actually have to change their lifestyle).
The average joe is bombarded with hype ( once the media say global warming is happening enough times, viewers end up believing it without question because the alternative view gets little airtime.
At the moment aviation contributes a piddling 3% to carbon emmisions but thanks to forecast growth predictions (based on little fact and ignoring the growth in industrial nations) we are targetted because if people can afford to pay to fly, they can afford to pay a bit more to fly.