In recent years, analysts, researchers and environmental policy makers have been faced with a serious shortage of empirical data on environmental phenomena. In fact, the information gathered by various organisations has not yet been systematically classified into a consistent system of accounts. This book presents the results of a joint research effort by the Fondazione Eni Enrico Mattei and Italy's Central Statistical Office (ISTAT) to design a system of accounts for natural and environmental resources. The resulting environmental accounts can be integrated with the existing system of national accounts, in order to estimate the so-called `green GDP' or `net national product' (NNP).In recent years, analysts, researchers and environmental policy makers have been faced with a serious shortage of empirical data on environmental phenomena. In fact, the information gathered by various organisations has not yet been systematically classified into a consistent system of accounts. This book presents the results of a joint research effort by the Fondazione Eni Enrico Mattei and Italy's Central Statistical Office (ISTAT) to design a system of accounts for natural and environmental resources. The resulting environmental accounts can be integrated with the existing system of national accounts, in order to estimate the so-called `green GDP' or `net national product' (NNP).Preface to the English Edition; D. Siniscalco. Introduction; I. Musu, D. Siniscalco. Part One: Fundamental Concepts for the Development of a System of Environmental Accounts by ISTAT. 1. First Report of the Commission ISTAT-Fondazione Eni Enrico Mattei for the Study of a System of Environmental Accounting; C. Costantino. Part Two: Contributions towards an Environmental Accounting System. 2. Environmental Accounting: Introductory Remarks; I. Musu, D. Siniscalco. 3. Environmental Accounting: Problems and Proposals; G. Sammarco. 4. Environmental Accounting Polƒ-