A setback for efforts to meet California's mandate to obtain a third of its electricity from renewable sources by 2020.
From Audi ads to BP coffee spills, with locavore ball-busting and Obama-baiting in between, here are the stories you loved to debate this year.
If 2010 was the year of big solar projects, 2011 is shaping up to be the year of big solar litigation. A Native American group has sued to block construction of six huge solar thermal power plants.
IBM has partnered with Rio de Janeiro to create an operations center that will give the Brazilian city's emergency-management team access to a vast array of data.
Rachel Botsman, coauthor of a book on collaborative consumption, details a 21st century economy rising up to take advantage of all our unused stuff.
As our economy continues to sputter, one little-noticed industry has been booming for a while now: energy efficiency.
For a host of startups that make software to manage corporate carbon emissions, the EPA action is a holiday gift that will keep on giving year-round.
We offer here our "holiday wish list" for American workers to preserve an innovation-led economy that makes stuff and creates good jobs here at home.
The nation's metro areas could be centers of innovation, green jobs, and low-carbon technology. So why do we treat them like stepchildren?
We've devised the world's shortest survey to find out what kind of actions our readers are taking. You know you want to.