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Jan 20, 2015 01:30 PM ET // Stuart Gary, ABC Science Online
Nitrogen may have arrived on Earth in ancient meteorites after the planet had already formed.
Jan 17, 2015 08:20 AM ET // Patrick J. Kiger
Humans have crossed four of nine 'planetary boundaries' that could render Earth less hospitable to life, reports a new study. Continue reading →
Jun 26, 2014 06:30 PM ET // Patrick J. Kiger
New images from NASA's Aura satellite show that over the last decade, the amount of the pollutant nitrogen dioxide in the nation's air has decreased significantly. Continue reading →
Jan 20, 2011 10:43 AM ET // Kieran Mulvaney
Burning fossil fuels could ultimately have profound consequences for ocean life.
Oct 23, 2010 11:44 AM ET // Tim Wall
The Everglades' alligators, herons and other inhabitants wade in cleaner water than they did in the 1970s.
Aug 15, 2011 07:43 AM ET // Tim Wall
Capturing ammonia as opposed to scrubbing it from feedlot waste could provide farmers a local source for fertilizer.
Aug 1, 2011 09:58 AM ET // Tim Wall
Scrubbing wastewater of nitrogen is a potential business boon waiting to happen; it would help reduce energy use as well as air and water pollution.