Power of Attorney Filing

This filing is a Power of Attorney document for Gevo, Inc. (GEVO). It appoints E. Cabell Massey and others as attorneys-in-fact to act on behalf of officer Kyle James. The attorneys-in-fact are authorized to handle all necessary filings with the SEC, including Forms 3, 4, 5, Schedules 13D and 13G, and Forms 144, using the EDGAR system. They can also obtain information about company securities transactions from third parties. The document clarifies that the attorneys-in-fact are not required to independently verify information and that James remains responsible for compliance with securities laws. This Power of Attorney revokes previous ones and remains in effect until James is no longer required to make such filings or until it is revoked.