The 5th International Conference on Energy and Sustainability took place in Putrajaya near Kuala Lumpur, Malaysia, organised by the Wessex Institute of Technology, represented by Professor Carlos Brebbia; Malaysia Research and Education Network (MYREN), represented by Professor Hussain Al-Kayiem of Universiti Teknologi Petronas and the Universiti Teknologi Mara, represented by Professor Syed Zubir