The ISO New England Electric Generator Air Emissions Reports available below provide a comprehensive analysis of New England electric power generator air emissions (nitrogen oxides [NOX], sulfur dioxide [SO2], and carbon dioxide [CO2]) and a review of relevant system conditions.
During the ten-year period from 2012 through 2021, native system emissions decreased: NOX by 39%; SO2 by 87%; and CO2 by 20%. With imports from outside New England taken into account, the decrease in CO2 emissions was 17%. The emissions decline during this period reflects shifts in the regional generation mix, with increased natural gas-fired generation as well as growth in solar, wind, and other zero-emission resources, which offset declines in coal- and oil-fired generation.
