SEIA

Under overcast skies, Patti Jarrett learned she had a nearly ideal roof for the 3.29-kilowatt solar energy system she planned to lease. South facing. Good tilt. Little shade.

Good Magazine

An average American's greenhouse gas emissions begin to decrease around age 60. Retirees aren’t struck by a sudden commitment to the environment, but because they're not working full-time, they drive less. They might buy fewer clothes. They move into a smaller house. Now, two companies are betting that the promise of ditching electric bills for the rest of their lives will compel them to choose a net-zero energy house, too.

Google (GOOG) is stepping up wind-power purchases to reduce emissions, even as it devotes most of its renewable energy investments to sun-related projects, a trade-off aimed at reining in costs as the company seeks higher returns.

Planet Orange is now a power house. Phoenix and Arizona Public Service officials, NBA Phoenix Suns executives and point guard Steve Nash on Monday switched on 966 solar panels on the roof of US Airways Center parking garage. They've named it the APS Suns Powered Solar Structure.

The Army is preparing to collect proposals for a contract vehicle worth up to $7 billion over as many as 30 years meant to help it manage energy resources at Army bases around the country.