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7 billion people

World’s largest Webpage Aims To Put World Population Into Perspective

by Mandy Adwell on 05/07/2013

7 Billionth Person Born On Earth – What Does This Mean For Our Future?

by Joseph Tohill on 11/01/2011

World Population: What If Nearly 7 Billion Lived In One Megacity? [Graphic]

by John G Johnston on 01/23/2011

Stockholm Train Station Harvesting Body Heat To Warm Building

by John G Johnston on 01/16/2011