This report aims to provide an overview of potential opportunities to participate in clean tech value chains, using new and evolving analytical tools from the World Bank Group that may help inform national policymaking around the EU's targets for clean-tech manufacturing. The focus is on four countries in Central and Eastern Europe (4CEEs): Poland, Romania, Bulgaria and Croatia. Given the strategic sectoral priorities set by EU policy, a central question concerns where within these sectors (and their EU value chains) the 4CEEs are already competitive or close to it, and have the potential to upgrade their prospects for growth and job creation as these value chains develop.