Rekksu

The rise of China only just over doubled China's GDP in the first decade of the 21st century

Isn't that in line with his argument? I recall the book explicitly mentioning this as an example. Chinese growth was enabled by internal migration, as agricultural workers move to cities and work more productive industrial jobs.

Supposing that global migration levels substantially increase and we realize the profound productivity gains, how do we deal with the unpriced external costs of increased consumption? Is the solution simply carbon taxes?

Someone mentioned some concern about commodity prices spiking, so I guess this is about the opposite problem.

I guess I'm less concerned about the deleterious health effects of pollution than the effects of climate change specifically, especially on poor countries.

Do you think that we can avoid catastrophic climate change while accelerating consumption growth? Or do you think the growth in consumption will outweigh the affect of climate change on welfare?

I assume they will answer, but I would strongly suggest buying the book. It's literally a comic book and is very easy reading.