this will pick an entire field... certainly smaller options exist, but i doubt the ROI would be worth it - much like this gardening bot...
assume 2000 g of tread mass per tire (~20%)
assume 4 tires
6.1mg / 4 tires = 1.525 mg tire wear "emissions" per vehicle km per tire
assume total tire wear is 10x higher than "emissions": 15.25 mg total tire tread wear per vehicle km per tire
allows for ~131,000 km of tire life.
I am not so sure about the rational of classifying "re-suspension" as an "emission" however.
Some transformers can have high efficiency when running at light loads - but that means you just paid extra for an oversized transformer. In general, copper losses go up with the square of load current and iron (core) losses go up with the square of voltage. Of course a 30MW transformer will be designed for higher efficiencies - no one wants to pay for 10MW of losses or deal with all that heat.
Compared to gasoline (according to wikipedia), 300kJ is about 0.01 Liters of gasoline = about 1 cent worth. So 1 penny worth of kinetic energy is lost every time you have to emergency stop on the freeway with your SUV? At normal highway speeds its less than half that energy (E=1/2 m v^2).
Do you suffer painful illumination? -- Isaac Newton, "Optics"