SoylentNews

upstart writes:

The biofuel's bipartisan support isn't about science, but politics:

Two decades ago, when the world was wising up to the threat of climate change, the Bush administration touted ethanol — a fuel usually made from corn — for its threefold promise: It would wean the country off foreign oil, line farmers' pockets, and reduce carbon pollution. In 2007, Congress mandated that refiners nearly quintuple the amount of biofuels mixed into the nation's gasoline supply over 15 years. The Environmental Protection Agency, or EPA, projected that ethanol would emit at least 20 percent fewer greenhouse gasses than conventional gasoline.

Scientists say the EPA was too optimistic, and some research shows that the congressional mandate did more climatic harm than good. A 2022 study found that producing and burning corn-based fuel is at least 24 percent more carbon-intensive than refining and combusting gasoline. The biofuel industry and the Department of Energy, or DOE, vehemently criticized those findings, which nevertheless challenge the widespread claim that ethanol is something of a magic elixir.

"There's an intuition people have that burning plants is better than burning fossil fuels," said Timothy Searchinger. He is a senior researcher at the Center for Policy Research on Energy and the Environment at Princeton University and an early skeptic of ethanol. "Growing plants is good. Burning plants isn't."

Given all that, not to mention the growing popularity of electric vehicles, you'd think ethanol is on the way out. Not so. Politicians across the ideological spectrum continue to tout it as a way to win energy independence and save the climate. The fuel's bipartisan staying power has less to do with any environmental benefits than with disputed science and the sway of the biofuel lobby, agricultural economists and policy analysts told Grist.

"The only way ethanol makes sense is as a political issue," said Jason Hill, a bioproducts and biosystems engineering professor at the University of Minnesota.

Although the 15 billion gallons of ethanol mixed into gasoline each year falls well short of the 36 billion that President Bush hoped for, the number of refineries in the U.S. has nearly doubled to almost 200 since his presidency. Between 2008 and 2016, corn cultivation increased by about 9 percent. In some areas, like the Dakotas and western Minnesota, it rose as much as 100 percent during that time. Nationwide, corn land expanded by more than 11 million acres between 2005 and 2021.

"A quarter of all the corn land in the U.S. is used for ethanol. It's a land area equivalent to all the corn land in Minnesota and Iowa combined," said Hill. "That has implications. It's not just what happens in the U.S. It's what happens globally."

Journal Reference:Jan Lewandrowski, Jeffrey Rosenfeld, Diana Pape, et al. The greenhouse gas benefits of corn ethanol – assessing recent evidence [open], Biofuels (DOI: 10.1080/17597269.2018.1546488)

Original Submission