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Chung JW, Meltzer DO. Estimate of the Carbon Footprint of the US Health Care Sector. JAMA. 2009;302(18):1970–1972. doi:10.1001/jama.2009.1610
To the Editor: Despite heightened worldwide interest in sustainable health care, the carbon footprint of the US health care sector has not yet been estimated. Quantifying the environmental impact of health care is important to determine the potential value of mitigation efforts and to reduce harm associated with health care delivery. We estimated the carbon footprint of the US health care sector, defined as total greenhouse gas (GHG) emissions attributable to the production of health care goods and services.
Health care GHG emissions were estimated using 2007 data on health expenditures published by the National Health Accounts Team1 and the Environmental Input-Output Life-Cycle Assessment (EIOLCA) model developed by the Carnegie Mellon University Green Design Institute.2 The EIOLCA is based on the 1997 Industry Benchmark Producer Price input-output table from the US Bureau of Economic Analysis and is a matrix showing the dollar amounts of commodities that industries purchase from each other to produce their own commodities. EIOLCA augments input-output tables with data on pollutants and emissions released as by-products of each commodity. Category-specific GHG/dollar coefficients that express the amount of carbon dioxide (measured in metric tons) embodied in each dollar of health care produced were obtained from the EIOLCA. Category-specific health spending was multiplied by its corresponding coefficient to obtain GHG totals and then summed across categories to estimate the health care sector carbon footprint.
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