This document is a 3829-word paper submitted to Wawasan Open University titled "Optimum Utilization of Environmental Resources Through Passive Architectural Design in Achieving Energy Efficiency in Belum Rainforest Resort" by Nurul Jannah Masturah binti Jailani. The paper discusses using passive architectural design techniques to optimize environmental resources and achieve energy efficiency in buildings at the Belum Rainforest Resort in Malaysia.