Don't forget that the petrol, methane or coal that powered your car, or even the construction of your car, released net-new carbon. Brake pads and tire wear ag

Don't forget that the petrol, methane or coal that powered your car, or even the construction of your car, released net-new carbon. Brake pads and tire wear against shoe tread. I think the shoe treads are less polluting per unit mass, but I don't get 30,000 miles from my walking shoes either. What's the carbon and pollution footprint of getting that gallon of petrol to my car? Or the amortized cost of getting 10KW-H into my car battery? Good to think holistically, but there's a long way to go. The city bus or light rail is looking better.