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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.