Yes, that struck me as well.

I wonder where the topsoil figures in Mr Bezos' vision; the bit where you grow the food. All life depends on that really.

Aquaponics to the rescue

other articles on the net show that he provided a few hundred year time frame. So as with any long term prediction its not something worth challenging. Once you push beyond a generation its usually the same as throwing it at the wall and seeing what will stick.

Though I do disagree that energy production on this planet will be limited, if anything it will become excessive once the clean energy revolution takes over. Then our big problem becomes dealing with all the heat pollution from using the energy

I think extreme wealth must in some way contribute to insanity. I wonder if he puts tissues down on the floor before he takes a step.

He's just trying to out-vision Elon Musk, whose idealistic leaps are looking less and less implausible by the day.

I wouldn't go that far. The only thing he's done really well is sell cars at $100k a pop with a fancy battery and computer at a loss. Visionary sure - but the fruits of his labor are still unborn, especially when burning/raising that much cash!

Um... I'm no Musk fanboy but have you forgotten landing stage one rockets, which is going to drastically lower the cost of space launches?

I'll admit that's badass. But he isn't the only one landing unmanned rockets.

He has also delivered cargo to orbit in predictable and economical fashion.

or may be the insanity someway contributes to the extreme wealth. you can't build a $250 billion business always thinking in a sane way:)