Requires the Secretary to: (1) provide the heads of stakeholder federal agencies, the heads of state land management agencies, industry stakeholders, and the public with an opportunity to review and comment on the proposed methodology; (2) convene a committee of subject matter experts to review the methodology for capacity and risk estimation; (3) publish a description of the final methodology and issue a public report that responds to the comments received and the methodology review; (4) complete a national assessment of geological storage capacity for carbon dioxide using the methodology; (5) establish a database on the Internet accessible to the public that provides the results of the assessment and includes the data necessary to rank potential storage sites for capacity and risk; and (6) report to Congress on the findings of the assessment.