What Is the Cimo Synthesis Reaction?

Life on earth before there was oxygen. How did we do it? With photo synthesis. That's how we had obligate anarobes at dead. Oxygen will kill you. Cant i kill you? Yesa, because the sun is a deadly lazer,. not an evil or isaplinke d go never see that history of the whole universe... Ha, ha hah ha. All right. I like your endition. Thank you.