Last week China passed the U.S. as the world's largest economy, by at least one measure: http://www.marketwatch.com/story/its-official-america-is-now...

It's just staggering how quickly they're growing. China used more concrete in 3 years than the U.S. used in the entire 20th century.

http://www.forbes.com/sites/niallmccarthy/2014/12/05/china-u...