Accumulationrefers to the changes in stocks of energy products within the economy.
environmental goods and services sectormeans the production activities of a national economy that generate environmental products (environmental goods and services).
environmental protection expendituremeans the economic resources devoted by resident units to environmental protection.
physical energy flow accountsmeans consistent compilations of the physical energy flows into national economies, the flows circulating within the economy and the outputs to other economies or to the environment.’;