Progress in Ghana
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Read previous versions of the Annual Letter
Three videos that explain this month’s big meeting at the U.N.
An update on the machine that turns feces into water.
See if you can beat my score on this quiz.
In our Annual Letter, Melinda and I wrote about what the future holds.
Looking back at 2013, I wanted to share a different kind of list.
This is my personal blog, where I share about the people I meet, the books I'm reading, and what I'm learning. I hope that you'll join the conversation.
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