New doc, American Meat, aims to ignite conversation about meat production

Planners need to acknowledge the history, geography and diversity of cities, says renowned urban thinker

Mild-flavored herbs deserve starring roles

Chicago photog documents green spaces in bloom on city rooftops

Can the Ultra-Ex project save Cleveland?

Veggies and herbs thrive in space where development stalled

We're running out of time, ClimateWorks report argues

Conflict over resources could cause global instability, says U.N. official