21 October 2011
Last updated at 14:50
How is the changing global population affecting people's daily lives? With the UN set to announce that there are now seven billion people on the planet, BBC News reporters spoke to seven people from around the world to hear their stories.
Production: Anna-Marie Lever, Fiona Crack, John Galliver, Emily Jones. Design: Mick Ruddy, Claire Shannon. Development: Martyn
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