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The 5th ASEAN Energy Outlook (AEO5) analyzes energy trajectories for 10 ASEAN Member States through 2040. It compares a Business-as-Usual (BAU) scenario with two target-based scenarios: the AMS Targets Scenario (ATS) and the ASEAN Progressive Scenario (APS). The report finds that while the region is on track to meet energy intensity targets, achieving the 23% renewable energy share by 2025 requires significantly more ambition than current national targets provide. It highlights a continuing heavy reliance on fossil fuels, particularly coal in the power sector, and projects increasing import dependency for natural gas and crude oil. The report recommends strengthening energy efficiency and renewable energy policies, including the use of auctions and expanding renewables beyond the power sector, to improve energy security and reduce CO2 emissions.