The 3rd ASEAN Energy Outlook projects energy demand and supply in ASEAN up to 2030 using two scenarios: a Business as Usual scenario and an Alternative Policy Scenario that incorporates additional energy efficiency measures. Under the Business as Usual scenario, primary energy consumption in ASEAN is projected to increase nearly fourfold by 2030. The Alternative Policy Scenario projects 18.5% lower energy consumption, demonstrating the potential for energy efficiency to reduce demand. Both scenarios indicate ASEAN will remain heavily dependent on fossil fuels, particularly oil and coal. The report emphasizes the need for ASEAN to improve energy efficiency, develop renewable energy, and strengthen regional cooperation to enhance energy security and reduce environmental impacts.