In the face of the climate crisis and growing environmental challenges, ecological financing is vital for sustainable development. Its effectiveness relies not only on funding size but also on transparent, participatory, and accountable planning. Open budget information, civic engagement, and strong accountability mechanisms are key to ensuring public funds benefit the environment. As part of OGP Week 2025, this webinar promotes open budget approaches, highlights innovations like Ecological Fiscal Transfers and ecological endowments, and encourages multi-stakeholder collaboration. It aims to strengthen public trust, promote inclusive governance, and support data-driven environmental policy advocacy at both national and local levels.