What is "nitrogens"

Usage examples of "nitrogens".

He could smell the wet grass, the heady spice of pine needles, bitter smoke from some far-off burning, and from these odors, these sights, it seemed to him that the faces and forms of his past were being extruded, some still-vital essence of each being released into the air and growing more vital yet on being kissed by the rich nitrogens and stinging ozones of the moment, rearing up before him like the fabulous visions that come to a dying man who can longer feel the terrible insult done his body by wound or disease, but rather is drifting in a blissful nowhere between Mystery and the end of time.