This book highlights current efforts and research in Malaysia on conversion of bio-resources to renewable energy of biofuel as an alternative way of producing energy from fossil-based fuels. The book starts with the renewable energy developments and policies in Malaysia and discusses the main renewable resources available. It addresses the use of more environmentally friendly technologies which can lead to the reduction of pollution and thus sustaining the ecology for treatment of bio-resources. The book also presents new initiatives in bioenergy production with theories, applications, and challenges of biological processes of biofuel production such as bioethanol, biobutanol, biogas, microbial fuel cell (MFC), and biodiesel. It discusses the potential of renewable energy resources to meet the energy needs without damaging/affecting the environment.