Sarah Gardner
Reporter
Sustainability
A cyclist rides past a parked car and its exhaust pipes in Berlin, Germany.
Sean Gallup (c) Getty Images
Business
An Entergy employee works to repair power lines in the Lakeview section of New Orleans in October 2005.
Robyn Beck: AFP/Getty Images
Sustainability
A hazy day in Los Angeles
David McNew/Getty Images
Sustainability
The Exelon Bryon Nuclear Generating Stations cooling towers in Bryon, Ill.
Jeff Haynes, AFP/Getty Images