The term 'It's in the Air' can be broken down into four crossword solutions: OXYGEN (6 letters), NITROGEN (8 letters), ODOR (4 letters), and NEON (4 letters). OXYGEN and NITROGEN are two of the most abundant gases in Earth's atmosphere, making up 99% of the air we breathe. ODOR is a term used to describe a smell, which can be caused by a variety of airborne particles. NEON is an inert gas that is used in lighting and signage. Together, these four elements make up the air we breathe and the environment around us.