I don't know how you can say that. I know exactly where jet fuel comes from and knew my flight to Britain was going to melt something like 2 m^2 of arctic ice.
Don't get me wrong, I try to avoid travelling and reduce my footprint where I can, but like they say, there is no ethical consumption under capitalism. Consuming less is great, but the problem is that this economy is structured in a way that will kill us, not that we need to consume things to live.
Big change has to come from the bottom up. If the electorate doesn’t ask for changes to be made, politicians aren’t going to make them. Now that climate is a political left/right issue, it’s even less likely for meaningful change to happen. The right seems to have forgotten how much of our existing environmental protections were put in place by Republican administrations (especially Nikon’s).
I doubt many of us will give that up voluntarily. Most people don’t want to walk away from Omelas.