You are the carbon they want to reduce.
To keep this going, you need ever more people but for this to be sustainable, they now need to be confined to tiny boxes in megacities, fueling the economy mostly by producing and consuming virtual items, and keeping their physical consumption to a bare minimum.
Meanwhile, the billionaire class has the rest of the world as their playground, and can happily get around by supercar or private jet.
> economic growth relies on population growth
No it doesn't.
> they now need to be confined to tiny boxes in megacities
Completely wrong.