It's not that people "want" to run combustion engines or use fossil fuels. The problem is that over 80% of the world energy output comes from fossil fuels at th

It's not that people "want" to run combustion engines or use fossil fuels. The problem is that over 80% of the world energy output comes from fossil fuels at the moment. Taking the CO2 out then requires more energy than we got out of it in the first place. So we would need to reduce our fossil fuel usage by something like 90% to have enough energy from renewables to be able to extract the CO2 back (that's just new emission, don't even think about recouping the CO2 from over a century of fossil usage). It's not possible unless we drastically reduce energy consumption to pre-industrialization levels, but with 7+ billion people. It's gonna be back to riding horses. Barring breakthroughs or divine intervention, there's not gonna be a magical 100% renewable energy replacement at current consumption rates. Fossil fuels are the "free" energy our world as we know it runs on, we don't just have a choice, or can tell people to clean up after themselves via taxes. It's just dancing around the problem, not a solution to anything.