A simple, but powerful example, of using visual aids to explain a complex, and changing, situation.
The best Hans Rosling talks you've ever seen(TedTalk)
The world's population will grow to 9 billion over the next 50 years - and only by raising the living standards of the poorest can we check population growth. This is the paradoxical answer that Hans Rosling unveils at TED@Cannes using colorful new data display technology (you'll see).
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