What does Cyanobacteria “eat”?
and gas in a large enough quantity (like the sun) consumes itself.
Nobody asked you what your diet is the question is what are you?...next?
...well gases do not necessarily consume themselves. A volume of gas will exchange energetic states until the inherent steric hindrances are eliminated through uniformity of conformation - losing heat as they do so - until they are rendered inert. (Couldn’t resist - the spaghetti monster made me do it)