Ethanol Fuels More Than Cars
The explosion of ethanol production is fueling more than cars -- it's also fueling the growth of algae in America's rivers and bays, creating new water quality challenges.
That's according to the Saint Louis Post Dispatch, which engaged scientists at the University of Illinois to assess the impacts of the biofuels boom that is sweeping the Midwest.
As more farmers plant more corn to take advantage of a 7.5 billion gallon ethanol mandate in the 2005 Energy Bill, farmers are applying -- and losing -- more and more fertilizer.
The same nutrients in fertilizer that help corn grow also contribute to the growth of algae. When the algae die and decompose, the tiny plants use up much of the oxygen in the water.
The best known low oxygen "dead zone" caused by agriculture is the 8,000 square mile dead zone in the Gulf of Mexico. But, most of America's bays feature "dead zones" and many of our rivers, including the Mississippi and its tributaries, suffer from poor water quality.
Agriculture is the most commonly cited reason for America's water quality woes.
Congress, of course, has a solution: produce even more ethanol. The House and Senate will soon vote on a proposal to increase the ethanol mandate to 36 billion gallons, including at least 15 billion gallons from corn ethanol.
Whether the mandate will include environmental safeguards remains to be seen.
According to USDA, producing even 15 or 20 billion gallons of ethanol without appropriate environmental safeguards will increase the amount of fertilizer applied by roughly 2 percent and 6 percent, respectively. But, as the Post Dispatch reported last weekend, some scientists warn that nitrogen runoff caused by such as an increase in ethanol production will increase by nearly 30 percent.
Some farmers are using fertilizers with greater precision, and many farmers are installing buffers of grasses along their fields to intercept and filter farm runoff. But, less than 40 percent of farmers conduct basic soil tests before applying fertilizer and less than 10 percent use special gizmos that link fertilizer applications to soil and plant needs.
Congress should not solve our energy problems by creating water quality problems. The next Farm Bill should dramatically increase incentives for farmers to use fertilizers with greater precision and the next Energy Bill should link any increase in the ethanol mandate to tough environmental standards.
Until we figure out a way to make ethanol from algae, we should find ways to keep fertilizers on our farms -- and out of our rivers.