Construction costs are currently skyrocketing

I don't believe that this here

For most people, the imperative desire for a car is not evolutionarily programmed into the brain.

For most... ROFL

Let us not make the all-too German mistake of losing ourselves in the clouds, the eternal idealism. With our feet on the ground, that is how you perceive. Overpopulation is a fact. But not here, so I don't have to talk about births here; in Egypt, I have nothing to say. Check it off. Climate warming is a fact, 99% due to CO2 and methane, according to the vast majority of science, so check it off. What can we do? Let's save CO2 and methane where we have influence. Not in China, but here. Everyone on their own, and then as a whole something will come out of it. Mette Frederiksen gave the motto in CPH last year: by 2030 the Danish economy is to be CO2 neutral. That is 10 years. The path: offshore wind farms supply the electricity, a deal with Norway states that we supply you, you help us then when there is no wind with hydropower, we balance surpluses. The power lines for this already exist or are being expanded. From 2030 no combustion engines in cars anymore. The ferries are being converted to hybrid or fully electrified. The heating systems are either air-water heat pumps or district heating, the network for this is huge compared to Germany. Organic farming is promoted because of the better methane balance, too much livestock farming, too much cheap meat. Etc. All small things, in sum they cause an economy to change course. If everyone in the EU does something similar, that already makes a difference.

You are all right!

By the way...I know this is rather incidental here but construction prices are continuing to rise. Just saw it when I looked out the window! :D ;)

A child will produce a CO2 footprint for the next 70-90 years, while the diesel car driver maybe only for 10 years.

And after 10 years the car driver then goes on foot?

But otherwise this is not factually correct. The footprint arises because people buy and drive cars, consume products that are not CO2 neutral, etc.
Calculating exactly this consumption against the existence of the potential consumer means: Whoever does not create new buyers can buy much more themselves with the same CO2 balance. What meaningful conclusions does this lead to? I see none...

What can we do? Let’s save CO2 and methane where we have a say. Not in China, but here. Everyone on their own, then it will amount to something as a whole.

Yes. If everyone did that. The problem: It doesn’t work on a voluntary basis. very nicely listed reasons for that. And the further problem: There is no partial success, you either prevent the tipping points, or you don’t. If not, one – no, usually others – have to clean up the mess. That’s how it is, unfair, stupid, calls a lot into question, like how the world has been organized so far.

I hope you’re slowly realizing that you have drifted quite far off topic :-)