Jeff Sachs has the Millennium Villages. He spends $2.5...

Jeff Sachs has the Millennium Villages. He spends $2.5 million in one village. It's an absolutely ridiculous model, because I've said that if you gave me $2.5 million, I can train 100 grandmothers, solar electrify 100 villages - 10,000 houses - and save you 100,000 litres of kerosene.