Establish multinational consortium to develop and operate shared deep geological repositories in geologically stable territories, pooling costs across 31 waste-generating nations. Governance: IAEA oversight, host-nation royalties, proportional cost-sharing by waste volume. Priority sites: stable granite formations in Canada, Scandinavia, Australia. Reduces per-country cost from $30-50B to $2-5B through shared infrastructure. Timeline: first repository operational by 2040.