There will still be no structured global debate on the potential use of geoengineering techniques. At the 6th UN Environmental Assembly (UNEA 6) in Nairobi, Switzerland failed for the second time with a proposal to initiate a discussion on measures of solar radiation modification (SRM) in an international forum. After nearly two weeks of negotiations, the United States, Saudi Arabia and Japan opposed establishing a universally accessible knowledge base at the multilateral level.