The Eighteenth Meeting of the Working Group on Environment (WGE AM-18) was held in Jinghong, Yunnan, People’s Republic of China (PR China). The meeting was hosted by the Ministry of Environmental Protection, PR China, with support from the Greater Mekong Subregion Environment Operations Center (EOC). The major objectives of the meeting were to (i) review progress made by the Core Environment Program and Biodiversity Conservation Corridors Initiative (CEP-BCI), review the CEP-BCI work plan for 2012–2013, and (iii) explore GMS collaboration and initiatives in the thematic context of “Green Economy.”