Existing debt-environment solutions overlook critical macro-financial linkages. This seminar will address this gap by modeling four green debt instruments – concessional borrowing, local-currency investment, interest renegotiation, and principal adjustment – and their combinations for Colombia using the GEMMES macroeconomic framework. The results identify robust Pareto-optimal strategies that achieve green investment targets and reduce harmful exports while maintaining greater macroeconomic stability compared to the baseline. While debt relief can temporarily ease imbalances, lasting stability requires structural economic transformation. This research contributes to the debate on international financial architecture by integrating macroeconomic resilience and linking historical debt analysis with contemporary sustainable development challenges.