A quick trip to 7 Billion! [Infographic] yucin December 15, 2011 Airplane, Animal, Animals, Auto, City, Communication, Computer, Construction, Culture, Economy, Education, Energy, Engineer, Environmental, Food, GSM, Health, History, Industry, Life, Military, Movie, Music, Natural Disaster, news, Politics, Science, social, Space, Sport, Technology, Terror, Transport, war, WorldSource http://www.worldof7billion.org/Similar posts: Total Views : 3,773