I don’t want to be a bothersome imp, tugging at your elbow and telling you not to buy that bottled water. But I’m going to do it: the industry that helps you slake your thirst is really harming communities...

Think about two-wheeled contraptions gliding down the street, like an eco-friendly parade: With San Francisco considering a bicycle-sharing program, to begin at the end of 2011, more bikes may take to...

Dear Urban Philosopher: I’ve been watching the news coverage of the British Petroleum oil spill, and I’m horrified by the sheer weight of this catastrophe. I’ve heard rumblings that the United...