The System of Environmental-Economic Accounts (SEEA), currently under revision, will provide the internationally-agreed conceptual framework to measure the interactions between the economy and the environment and the state of the environment. The revised SEEA will build upon its predecessors: the SEEA-2003 and the SEEA-1993.

The revised SEEA is organized into three main parts: the Central Framework, Experimental Ecosystem Accounts, and Extensions and Applications. The Central Framework, consisting of the internationally agreed standard concepts, definitions, classifications, tables and accounts, is scheduled for completion by February 2012. Experimental Ecosystem Accounts and Extensions and Applications will not be considered international standards, but will describe best practices. They are scheduled to be completed by February 2013.

The revision process of the SEEA relies on broad global consultation involving experts from government agencies and international organizations. Consultation is designed as an iterative process, beginning with consultation on key issues, followed by draft chapters, and finally a draft of the consolidated chapters. The revision process was initiated by the United Nations Statistical Commission (UNSC). At its thirty-fifth session, the UNSC considered it timely to elevate the SEEA to an international statistical standard and mandated the United Nations Committee of Experts on Environmental-Economic Accounting (UNCEEA) to manage and supervise the revision process. The UNCEEA is assisted by various technical groups. Among these groups, the London Group on Environmental Accounting plays an important role in addressing technical issues.