'Losing Our Cool: Uncomfortable Truths About Our Air-Conditioned World'
August 17, 2010, 10:29 a.m. by Sarah F. Berkowitz
Environmental and political writer Stan Cox takes air conditioning to trial, using hot eco-topics to hand down a guilty verdict.
7 U.S. cities with the worst air pollution
August 4, 2010, 12:20 p.m.
The State of the Air 2010 shows that the air quality in many places has improved, but that more than 175 million people — roughly 58 percent — still live with pollution levels that are dangerous to breathe.
What's the environmentally preferable choice: A real Christmas tree or a faux one?
December 7, 2009, 5:20 a.m. by Matt Hickman
Sure, you can use a fake tree over and over again, but do you really want something made of PVC in your home over and over again? Matt Hickman investigates.