The Comings and Goings of Nitrogen Nitrogen, an innocuous molecule and 79% of the air we breathe, is one of the elements most threatening the global environment (Vitousek et al., 1997, Moffat, 1998).
(the air; breathe; we) (The Comings and Goings of Nitrogen Nitrogen; is; one of the elements) (the elements; most threatening; the global environment)
the air The Comings and Goings of Nitrogen Nitrogen the elements
breathe is most threatening
we
one of the elements
the global environment