Western-Russian relations are inarguably at their worst of the post-Cold War era. The Organisation for Security and Co-operation in Europe (OSCE) remains a key international forum for multilateral engagement. Part of the OSCE’s uniqueness is its formation around three dimensions of security, which constitute its comprehensive security. The Economic and Environmental (EED) is the most overlooked yet, as this paper demonstrates, also possesses substantial capacity for easing some tensions. Through, first, an analysis of the place of EED in the OSCE, and thus between the West and Russia, the article establishes potentialities for cooperation. Second, it identifies lack of support, most notably among Western governments, rather than post-Soviet, and the place of EED activities in post-Soviet states. Third, the article pinpoints unexpected but very real forms of cooperation in the EED in the protracted post-Soviet conflicts of Transnistria-Moldova and Abkhazia-Georgia, which can establish trust between parties with the potential to expand confidence-building further. The article concludes by calling for further use of the EED, in a time when it remains underestimated but of unexpected – and essential – value for confidence-building.