Umm ... You may be confusing net production with actual production (ie plants produce pretty much all the O2 but they then reabsorb it) I suspect it is also wo

Umm ... You may be confusing net production with actual production (ie plants produce pretty much all the O2 but they then reabsorb it) I suspect it is also worth differentiating between production as has been going on for millions of years and industrial production - there is really no way to collect or harvest the oxygen made by plants - but that is kinda implied by the GP statement (that they wanted to cool the roof make electricity and Oxygen production (the implication being something useful to a business based on that roof) So I can see your point. https://en.m.wikipedia.org/wiki/Oxygen_cycle https://en.m.wikipedia.org/wiki/Oxygen_cycle