A smarter approach to biofuels

A field of sorghum–it grows tall and fast!

The US biofuels industry has not covered itself in glory. It has consumed billions of dollars in taxpayer dollars, as much if not more from investors and in return delivered economic and environmental benefits that are murky at best, at least according to its critics.

You’ll hear a different story from the industry, which is desperately trying to retain its support in Congress and the White House. The  importance of the Iowa presidential caucuses virtually assure that no candidate for president can oppose support for corn ethanol, the dominant US biofuel. It was the Bush administration, you may recall, that launched the current push into biofuels, with the enthusiastic support of a corn state US Senator Barack Obama.

The thing is, biofuels need to be part of a low-carbon US economy. About 40 percent of emissions come from transportation–cars, trucks, trains, planes, buses, farm and construction equipment, etc.  These existing fleetss can’t be electrified en masse, anytime soon, if ever. So for decades ahead it’s fossil fuels or biofuels–an easy choice.

That said, it has become increasingly clear that corn ethanol “has proven far more damaging to the environment than politicians promised and much worse than the government admits today,” according to this excellent analysis from Dina Capiello and Matt Apuzzo of the Associated Press.

In their 2013 investigation, they write:

As farmers rushed to find new places to plant corn, they wiped out millions of acres of conservation land, destroyed habitat and polluted water supplies..

And as for the climate benefits of corn ethanol, the AP reporters say:

The government’s predictions of the benefits have proven so inaccurate that independent scientists question whether it will ever achieve its central environmental goal: reducing greenhouse gases. 


The trouble is that corn needs fertilizer (which is made from natural gas), requires irrigation (at least in some parts of the country) and, in an ideal world, would be used to feed people (or animals, if you insist), but not cars and trucks.

About the best thing you can say about corn ethanol is that it will pave the way (oops, that’s an unfortunate metaphor) for advanced biofuels that are cleaner and greener. Some of these are on the way–a bunch of cellulosic ethanol plants are scheduled to begin commercial operations this year, including the Project Liberty plant from Poet and DSM in Emmetsburg, Iowa, and a DuPont facility in Nevada, Iowa. Both will use corn waste.

Why, though, can’t we make biofuels from crops that are designed and bred for energy? That’s the question that led a young entrepreneur named Anna Rath to start a company called NexSteppe, whose current focus is sorghum. I invited Anna to Fortune’s Brainstorm Green conference in May, where she won the “Great Green Ideas” competition, and wrote about NexSteppe the other day for Guardian Sustainable Business.

Here’s how my story begins:

As scientists around the world research biomass feedstocks — trees, shrubs and grasses that are designed to produce energy — a California startup called NexSteppe is betting that fast-growing, drought-resistant sorghum will emerge as a crop to sustainably fuel cars, trucks and power plants.

Sorghum, a millenia-old cereal grain, today feeds animals and people. It is turned into flour, syrups and beer, and used in gluten-free products. In Asia, sorghum is made into couscous, and across Africa, it’s consumed as a porridge.

Last year, though, NexSteppe introduced two new brands of sorghum seeds, dubbed Palo Alto and Malibu, that were bred expressly to be energy crops. They grow on marginal land and in a variety of climates, and they climb to a height of 20 feet after only four months of growth.

“Sorghum is naturally very heat and drought tolerant,” says Anna Rath, NexSteppe’s founder, president and CEO. “It originated in Africa. It’s a camel of a crop, if you will.”

Although NexSteppe has done almost no marketing outside of Brazil, its biggest market, the company’s sorghum is now being grown by farmers in 15 countries, including China, India, South Africa, Germany, Canada and the US.

Sorghum may not be the ideal feedstock for biofuels. It’s used for food, after all. But it appears to offer major advantages over corn.

More important is the idea behind NexSteppe–that we should breed crops for energy, just as we have very successfully bred crops for food since the invention of agriculture. Government and university scientists are trying to do just that, as the story goes on to say. You can read the rest here.

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