We could stop building new cars today, and still have enough cars to last us decades. Look at Cuba.
We don’t need to keep building new cars, just rebuilding the ones we already have. Rebuilt engines and transmissions.
This would cut the carbon footprint of our planet down significantly. It’s crazy how much energy it takes to build a car; mining, refining, machining 10,000-20,000 parts per car, transporting parts around the globe to assemble larger parts, then moving those parts, to assemble cars, then transporting the assembled car.
Get people into busses and public transportation.
Stop buying stuff.