NCPA - National Center for Policy Analysis


December 19, 2007

Because of rising demand for ethanol, American farmers are growing more corn than at any time since World War II.  And sea life in the Gulf of Mexico is paying the price, says the Associated Press.


  • The nation's corn crop is fertilized with millions of pounds of nitrogen-based fertilizer that runs off fields in Corn Belt states and makes its way to the Mississippi River and eventually pours into the Gulf.
  • There it contributes to a growing "dead zone" -- a 7,900-square-mile patch so depleted of oxygen that fish, crabs and shrimp suffocate.
  • The dead zone was discovered in 1985 and has grown fairly steadily since then, forcing fishermen to venture farther and farther out to sea to find their catch.
  • For decades, fertilizer has been considered the prime cause of the lifeless spot.


  • The Environmental Protection Agency estimates that up to 210 million pounds of nitrogen fertilizer enter the Gulf of Mexico each year.
  • Scientists had no immediate estimate for 2007, but said they expect the amount of fertilizer going into streams to increase with more acres of corn planted.

Environmentalists had hoped to cut nitrogen runoff by encouraging farmers to apply less fertilizer and establish buffers along waterways. But the demand for the corn-based fuel additive ethanol has driven up the price for the crop, which is selling for about $4 per bushel, up from a little more than $2 in 2002.

That enticed American farmers -- mostly in Iowa, Illinois, Minnesota, North Dakota and South Dakota -- to plant more than 93 million acres of corn in 2007, the most since 1944. They substituted corn for other crops, or made use of land not previously in cultivation.

Source: Henry C. Jackson, "U.S. Corn Boom Has Downside for Gulf," Associated Press, December 17, 2007.


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