No, it's my relatively new and aggressively emission controlled cars.
[1] https://www.epa.gov/ghgemissions/global-greenhouse-gas-emiss...
Right now, all most people do is vote (if they even bother) or maybe make donations, which really doesn't seem to be enough. Voting is important, but it doesn't have much impact if the same kinds of candidates keep getting elected, which is largely due to dysfunction in the electoral system, at least in the U.S. (and probably elsewhere, but I don't know enough about other countries to say).
Similarly, all most people do is recycle, which definitely isn't enough, given a lot (most?) of what gets put in the recycling bin doesn't get recycled, due in part to both lack of financial incentive as well as contamination from non-recyclables (confusing rules and general lack of care apparently).
I would like to think we could vote in a government that's focused on progress rather than partisan power struggles, but I don't think that's likely to happen any time soon, if ever. It would require a level of engagement that I just don't see happening.
I'd also like to think that we could change our habits on a mass scale and demand change through social and market forces, but in a similar way, I don't see that happening either. Their are just too many economic and cultural forces acting against progress.