1647632 Over 95% of Titan's atmosphere is nitrogen. nonong 2079843 Air is composed mainly of nitrogen and oxygen. MrShoval 1733640 Air is mainly composed of nitrogen and oxygen. MrShoval 1732529 The air mainly consists of oxygen and nitrogen. Eldad 262578 The air we breathe consists of oxygen and nitrogen. CM 1578594 The atmosphere mostly consists of nitrogen and oxygen. CM