People had more children when there was less economic opportunity.

Birth rates in an era with birth control and women’s ability to have careers is not comparable to birth rates without birth control and when women could not work.

Would you still be laughing if plants die off from lack of co2 and we stave?

I can't imagine what should happen for us to overshoot the co2 level and make it too low. We can't even slow down the increase of the global emissions, let alone freeze them at the current level, let alone reduce them to zero - which is the goal (I am talking about the emissions, not the concentration in the atmosphere). After the emissions are down to net zero, we need to start removing excess co2 from the atmosphere.

So what is the risk of overshooting and bringing co2 level down too much? I think there is a higher risk of the universe spontaneously disintegrating before that happens.

Have you seen the movie Snowpiercer?

That’s a movie. You know, fiction.

People also want trivial inter-country mobility.