Environmental accounting is a subset of accounting proper, its target being to incorporate both economic and environmental information. It can be conducted at the corporate level or at the level of a national economy through the System of Integrated Environmental and Economic Accounting, a satellite system to the National Accounts of Countries (among other things, the National Accounts produce the estimates of gross domestic product otherwise known as GDP). Environmental accounting is a field that identifies resource use, measures and communicates costs of a company's or national economic impact on the environment. Costs include costs to clean up or remediate contaminated sites, environmental fines, penalties and taxes, purchase of pollution prevention technologies and waste management costs. An environmental accounting system consists of environmentally differentiated conventional accounting and ecological accounting. Environmentally differentiated accounting measures effects of the natural environment on a company in monetary terms. Ecological accounting measures the influence a company has on the environment, but in physical measurements. Reasons for use There are several advantages environmental accounting brings to business; notably, the complete costs, including environmental remediation and long term environmental consequences and externalities can be quantified and addressed. More information about the statistical system of environmental accounts are available here: System of Integrated Environmental and Economic Accounting. Subfields Environmental accounting is organized in three sub-disciplines: global, national, and corporate environmental accounting, respectively. Corporate environmental accounting can be further sub-divided into environmental management accounting and environmental financial accounting. Global environmental accounting is an accounting methodology that deals areas includes energetics, ecology and economics at a worldwide level. National environmental accounting is an accounting approach that deals with economics on a country's level. Internationally, environmental accounting has been formalised into the System of Integrated Environmental and Economic Accounting, known as SEEA. SEEA grows out of the System of National Accounts. The SEEA records the flows of raw materials (water, energy, minerals, wood, etc.) from the environment to the economy, the exchanges of these materials within the economy and the returns of wastes and pollutants to the environment. Also recorded are the prices or shadow prices for these materials as are environment protection expenditures. SEEA is used by 49 countries around the world. Corporate environmental accounting focuses on the cost structure and environmental performance of a company. Environmental management accounting focuses on making internal business strategy decisions. It can be defined as: "..the identification, collection, analysis, and use of two types