CARMA attempts to report the ultimate owner (i.e. “parent” company at the top of the company hierarchy) for each power plant. When this is not possible, the operating company (usually a utility company) is reported instead. Companies can be private or public and include non-utility companies that own power generation facilities – everything from a [..]

Data presented for the “Future” reflects new plants or capacity expansions currently under construction or planned for some time in the future; it also reflects planned retirements. Data for the future is not

Regions refer to a range of geographic entities in CARMA. Emissions are aggregated at the level of countries and states or provinces as well as (in the U.S.) metro areas, counties, and Congressional districts. We also include totals for about 13,000 cities worldwide, calculated as the aggregate emissions and electricity generation of all geolocated [..]

Symbols used throughout CARMA to represent the type, size, and carbon intensity of plants, companies, and regions. For more information, learn All About Icons

Kilograms of CO2 emitted per (net) megawatt-hour of electricity produced.

Annual (net) megawatt-hours of electricity produced. Net generation is the amount of electricity sent to the grid (i.e. gross generation minus in-plant consumption). In some cases, net generation is estimated from gross generation.

 The percentage of total (net) electricity that is generated by the combustion of coal, oil, or natural gas.

 The percentage of total (net) electricity that is generated by hydroelectric power facilities.

 The percentage of total (net) electricity that is generated by nuclear power facilities.

 The percentage of total (net) electricity that is generated by the use of wind, solar, biomass, geothermal, captured heat, hydrogen energy, or other technologies that do not emit CO2.