Preventive Maintenance & Global Warming: Reversing the trend
That's right- photosynthesis. We make artificial plants- that is massive structures (as space allows) run by solar power that suck in the air via man-made stomata, mix it with water and mimic the reaction that is photosynthesis. Then have the O2 exit other man-made stomata.
Place these facilities near factories, cities, yada, yada, yada
Then sell the sugar...