As global demand for nitrogen fertilizer has increased, the U.S. has become one of the world's largest importers of this important commodity. This has resulted in America's farmers and food supply becoming more dependent on foreign sources of essential fertilizer products. According to data from the Economic Research Service of the United States Department of Agriculture (USDA), 54 percent of the U.S. nitrogen supply – or approximately 10.79 million tons – was imported in 2011.
Read more here: http://www.heraldonline.com/2012/09/26/4294103/air-permit-filed-for-billion-dollar.html#storylink=cpy
Read more here: http://www.heraldonline.com/2012/09/26/4294103/air-permit-filed-for-billion-dollar.html#storylink=cpy
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