2012 has been a bad year for West Nile cases in the U.S. Which states are hardest hit? Let's just say you might want to avoid Texas.
More than 770,000 Americans now bike to work, new Census data shows -- but women still make up a small minority of the bike commuters.
A federal court tosses Seattle's anti-phone-book ordinance in the recycling bin, citing the First Amendment. That's bad news for San Francisco too.
Scientists found that 7.2 percent of Alaskan birds they tested were infected with avian malaria.
Artist Michael Swaine fixes clothes for free on San Francisco streets. But he envisions going beyond fighting throwaway culture to start helping others build community.
Who decides what's "natural" and what's "eco-friendly"? Umbra peels back the latest on the labeling debate.
Santa Monica couldn't have gotten so green without an engaged community, says its assistant director of sustainability. Solar-powered ferris wheels don't hurt, either.
Is it possible to have an enviro-themed costume that's not totally lame? Umbra scares up some suggestions.
Four men from small villages in the Niger Delta hope to hold Shell accountable for a series of pipeline leaks.