Last month, I met an obstetrician in India and in the course of conversation, asked her how many babies she had delivered.   “After ten thousand babies, I stopped counting, ” she said.   Naturally…

Amit Jain |

Driving through Sao Paulo yesterday, I was struck by the power of cities. While cities are part of the climate change problem, they need to be part of the solution too. They are bigger and more…

Dan Hoornweg |