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Gevo Announces Closing of Acquisition of Ethanol Production Facility to Produce Isobutanol

Englewood, Colo.—September 23, 2010— Gevo, Inc., a privately held renewable chemicals and advanced biofuels company, announced today the closing of its acquisition of Agri-Energy’s ethanol production facility in Luverne, Minnesota. This plant is expected to provide 18 million gallons per year (MGPY) of production capacity for chemicals and fuels customers.

Engineering for the mechanical retrofitting of the plant has begun and isobutanol production is expected to begin early in 2012. During most of the retrofit process, it is expected that the facility will continue to produce and sell ethanol.

Gevo has developed a proprietary process designed to fit into current ethanol production facilities. The process also enables the production of isobutanol from numerous renewable feedstocks including corn, wheat, sorghum, barley, sugar cane and cellulosic feedstocks when biomass conversion becomes commercially available. Gevo’s integrated fermentation technology (GIFT™) platform consists of two components: a yeast biocatalyst and a separations technology unit that bolts into existing ethanol plants.

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About Gevo
Gevo is developing capital efficient biorefinery systems to provide renewable, cost-effective building block products to the fuel and chemical industries. Gevo seeks to convert renewable raw materials into isobutanol and renewable hydrocarbons that can be directly integrated into existing fuel and chemical products to deliver environmental and economic benefits. Gevo is committed to a sustainable biobased economy that meets society's needs for plentiful food and clean air and water. For more information, visit
www.gevo.com.

Media Inquiries:
Contact: Chris Stamm or Shweta Agarwal at Schwartz Communications, Inc. Phone: 781-684-0770, Email: gevo@schwartzcomm.com

Investor Inquiries:
Contact: Sarah McCabe at Stern Investor Relations, Inc. Phone: 267-909-9237, Email:
sarah@sternir.com