Ana Swanson, How China used more cement in 3 years than the U.S. did in the entire 20th Century, Washington Post, 3-24-15
http://www.washingtonpost.com/blogs/wonkblog/wp/2015/03/24/how-china-used-more-cement-in-3-years-than-the-u-s-did-in-the-entire-20th-century/
http://www.washingtonpost.com/blogs/wonkblog/wp/2015/03/24/how-china-used-more-cement-in-3-years-than-the-u-s-did-in-the-entire-20th-century/
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