I seem to remember CO2, water, and sunlight being important for something...
Oh well, it was a white man who taught me the subject...
It’s a word with lots of letters.
Beyond the comphrehension of the Pin Heads
https://en.wikipedia.org/wiki/Photosynthesis
https://en.wikipedia.org/wiki/Photosynthesis#/media/File:Photosynthesis_en.svg
Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth’s atmosphere, and supplies most of the biological energy necessary for complex life on Earth.