Comment by IdSayThatllDoIt

https://en.wikipedia.org/wiki/Great_Oxidation_Event We live on a planet saturated in one of the most corrosive pollutants (to life that evolved before it). If an anaerobic intelligent life had evolved before the world was conquered by cyanobacteria, in a society with a profit motive for manufacturing sugar, would they have farmed the very thing that would wipe them out?