The 9th Semi-Annual Meeting of the Working Group on Environment (WGE SAM-9) was chaired by Dr San Oo, Director, Environmental Conservation Department, Ministry of Environmental Conservation and Forestry (MOECAF), and co-chaired by Mr. Sanath Ranawana, Senior Natural Resources Management Specialist, Asian Development Bank (ADB). The meeting was attended by representatives from the environment ministries and Greater Mekong Subregion (GMS) national secretariats of Cambodia, the People’s Republic of China (PRC), Lao PDR, Myanmar, Thailand, and Viet Nam; donor partners; and GMS Environment Operations Center (EOC) consultants.