Kathy Mathers, vice president of public affairs for The Fertilizer Institute, said the cost of natural gas represents 70 percent to 90 percent of the cost of producing nitrogen. Natural gas is the heat source in the chemical process that produces nitrogen.
http://qctimes.com/news/local/article_ac1798b4-d153-11e1-8b79-001a4bcf887a.html
http://qctimes.com/news/local/article_ac1798b4-d153-11e1-8b79-001a4bcf887a.html
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