The Mayor’s Challenge is a contest run by Bloomberg Philanthropies to find the best ideas bubbling out of our cities--from data mining to turning foreclosed houses into urban farms.
In parts of rural India, people are more likely to have a phone than a toilet. MANTRA is trying to flip that ratio.
Forget what kind of energy it is--we can save most of it with simple improvements. And with that saving comes a lot of extra cash.
Liquid--a peer-to-peer bikesharing platform--is taking off. Not using your wheels some afternoon? There might be someone willing to pay for them.
EngAGE is a program in Los Angeles that helps low-income seniors have a happier, more fulfilling, and more creative life than you imagine in your standard nursing home.
Who was hit hardest by the storm?
Why spend billions on restringing, burying, or waterproofing power lines? True post-storm resilience lies in onsite renewable energy.