sustainability, environment, green, staff, vice-chancellors, pro-vice-chancellors, presidents, vice-presidents, Professor Joseph J.Y. Sung, Professor Ching Pak Chung, Professor Fung Kwok Pui, Professor Fung Tung, Professor Hui King Man Michael, Professor Sun Sai Ming Samuel, Professor Wah Wan Sang Benjamin, Professor Wong Nai Ching Henry, Professor Lee Shiu-hung