From the article: > It predicts a world population of 9.2 billion people, generating a global GDP four times the size of today's Global domestic product is c

From the article: > It predicts a world population of 9.2 billion people, generating a global GDP four times the size of today's Global domestic product is currently $63T. 2050 GDP = 4 * $63 = $252T. Current per capita GDP = $63 trillion divided by 6.8 billion = $9,264.70588 2050 per capita GDP = $252 trillion divided by 9.2 billion = $27,391.3043 So basically everyone will be 3 times richer, at a cost of "80% more energy" (less than 2 times the energy), which means energy efficiency will increase dramatically, probably due to the fact that we'll harness more solar and geo energy, which is delivered from the giant nuclear furnace in the sky, aka our sun.