[five18pm]

How does one go about eating the sun or the trillion trillion watts produced by sun? You need all that energy converted to something edible - that means there is at least one job, agriculture. If you can automate that, then there is the job of automation engineer. And so it goes...

[dvanduzer]

It's called photosynthesis, and it requires zero human intervention.

[JulianMorrison]

Photosynthesis is ridiculously inefficient at anything but building physical materials. And it would require a whole lot of human intervention to capture more than the pinprick of insolation that happens to fall on the non-arctic, non-desert parts of planet Earth (rather than waste off into space).