Cars
The Ford model T wins. All of the other models went through multiple iterations. I used to pick up the 1967 toyota corolla and put it on the sidewalk. Same with the first 2 cylinder civic. They were not cars, but carriagized motorcycles. Deathtraps too.
In any case, all that will come from a fully motorized china and india will be death of this planet. Cars and other fossil carbon burning has already done enough damage. Motorizing china alone will turn our atmosphere into a primordial soup.