China produces concrete about forty times more (each year) than the United States. http://www.bbc.com/news/world-asia-china-33802777
Concrete This is a key indicator of the development of civilization at a particular location. I have singled out the following railways and roads, for which the United States (about China) lag well as in dozens of times !!! Speech goes, of course, about development, not already established a network (for which China is also in the lead).
Returning to the concrete. This material was used in the place of production. (For example, the steel may give rise to trade or navy). Concrete is the roads and bridges, the city and the hydroelectric dam ... This is a long-term working infrastructure. Forty times !!! At comparable economies !!!
The official explanation for disparities: no. Informal explanation: the US practice of "deespeshnye, plywood buildings, because they have a warm and buildings, upon completion of the term of the mortgage, just have to be destroyed. Commercials disposable houses. "
But ... In China too warm.
My guess: to develop the mainland, really long ceased to invest in it. There is a "patching" the existing infrastructure. And it's not even a suggestion. The proportion of the production of 1 to 40 it is a fact.