uppopallo

I seriously believe that they should have stopped producing TED talks after Reggie Watts. He said everything that needed to be said. All talks afterwards were just reformulations of his core point.

Actually not that much: The russian https://en.wikipedia.org/wiki/BIOS-3 experiment tested this in the 70's, and found that given sufficient illumination, 17 litres of Chlorella Vulgaris algae are sufficient to provide oxygen for one person and scrub the exhaled CO_2 from the air.

The talk about spacecraft life support systems linked below (https://media.ccc.de/v/rc3-158638-how_to_survive_in_spacecra...) gives a thorough overview over the possibilities for plant-based oxygen generation.

This was just mentioned in this talk about spacecraft life support systems: https://news.ycombinator.com/item?id=25590724

I suppose you got it from there as well?

It's surprising how simple a setup this turns out to be, for creating a working bioreactor that produces oxygen.