|Thursday, July 11, 2002||38D||It's in the air||Elizabeth C. Gorski|
1 result for NITROGEN from Variety puzzles.
|June 10, 2012||cryptic||5D||New ring tone in the air, largely (8)||Emily Cox and Henry Rathvon|
2 results for NITROGEN from older pre-Shortz puzzles.
|Sunday, April 22, 1990||77D||Four-fifths of the atmosphere||Maura B. Jacobson||Maleska|
|Tuesday, January 17, 1989||48A||Most of the atmosphere||Don Groat||Maleska|