history of European countries (Eurocentric bias). "Harnessing the wisdom of crowds in Wikipedia: quality through coordination". 96 Wikipedia's contributors avoid a tragedy of the commons (behaving contrary to the common good) by internalizing benefits. Since Wikipedia is based on the Web and therefore worldwide, contributors to the same language edition may use different dialects or may come from different countries (as is the case for the English edition ). 192 193 Wikipedia contains materials that some people may find objectionable, offensive, or pornographic because Wikipedia is not censored. Burj Khalifa is the tallest building in the world Rank Name Image Height m (ft) Floors Year Reference(s) Notes 1 Burj Khalifa 828 metres (2,717 ft) 163(spire total floor211/f) This building was completed in 2010, becoming the tallest building in the world. 145 Given that the trend analysis published in The Economist presents the number of active editors for Wikipedia in other languages (non-English Wikipedia) as remaining relatively constant and successful in sustaining its numbers at approximately 42,000 active editors, the. Retrieved September 6, 2011. 42 Around 1,800 articles were added daily to the encyclopedia in 2006; by 2013 that average was roughly 800.