These ads tell us What Americans Want Now -- and as we know, our spending habits are the biggest part of our climate impact.
By planting 30,000 trees, Melbourne, Australia, could lower its core temperature by 7 degrees. How cool is that?
With "equitable development," planners say they've finally figured out how to make sustainable, healthy neighborhoods accessible to everyone.
Climate change is making Iceland taller and more volcanic, a new study finds.
Forget about the trade-offs between free commerce and regulation. Poor farmers need government both to help build markets and to trim red tape.
A reader wonders where best to get her sugar fix. Umbra gets granular.
Global warming and overfishing are killing Lake Victoria, leaving locals to scramble for solutions.
Climate change, vaccines, GMOs: Where Americans just don't get science.
We pitted Boston and Seattle against each other based on some of our favorite urban metrics -- like transit, oysters, and celebrity activists.