An integrated multilayer environmental impact assessment framework for accelerating sustainable energy infrastructure permitting

The deployment of sustainable energy infrastructure in the European Union is now limited less by technology costs than by the duration and unpredictability of permitting. Environmental Impact Assessment (EIA), the main authorization instrument for energy projects, evaluates the impacts of a proposal. What it does not evaluate is the quality of the governance process through which those impacts are assessed and decided, so risks arising from institutional fragmentation, weak stakeholder coordination, or the exclusion of affected groups stay invisible until they surface as objections, litigation, and delay. In this paper we develop an Integrated Multilayer EIA Framework that repositions EIA as a decision-support system for energy infrastructure permitting. The framework organizes the assessment into four coupled analytical layers, physical-environmental, socio-economic, institutional-governance, and stakeholder, and places network analysis of stakeholder interactions and institutional relationships at its core. Governance quality is expressed through a small set of structural indicators, reciprocity of engagement, brokerage concentration, the connectivity of affected groups to decision-makers, all derivable from documentation that procedures already produce. We illustrate the framework's diagnostic logic with governance patterns observed across European energy permitting, from onshore and offshore wind to agri-photovoltaics, hydropower, biomass conversion, and cross-border hydrogen infrastructure. The approach allows permitting risk to be detected earlier, stakeholder engagement to be targeted where it matters, investment certainty to improve, and the acceleration of authorization that the European Green Deal and REPowerEU require to rest on a sounder basis. Although developed for the EU permitting context, the framework is defined over procedural records that EIA systems produce everywhere, so its diagnostic logic transfers to any jurisdiction in which multi-actor authorization governs energy deployment.