CO2 intensity emissions, among the lowest generated by utilities

The following charts show direct CO2 emissions over the past three years.

CO 2 (t) emissions
  2017 2016 2015
Broader scope      
Generating 23,024,356 22,812,513 28,130,055
Cogeneration 3,671,908 3,728,577 3,457,204
Total 26,696,264 26,541,089 31,587,259


CO 2 emissions intensity evolution in termal plants
  2017 2016 2015
Specific emissions from thermal power plants (kg/MWh) 388 391 460


Global CO 2 emissions evolution
  2017 2016 2015
Total volume (Mt) 26.7 26.6 31.6
Specific emissions from global mix (kg/MWh)(1) 186 177 225


In 2017, CO2 emissions per MWh generated were among the lowest at the national and international level. For the purposes of comparison, the specific emissions of European electricity companies are 275 kg/MWh2. The low intensity of Iberdrola's emissions is justified by its production mix, with 54% emission-free production in 2017, down 38% from 2007.

Also noteworthy is the decline in the emissions intensity of the Group's power plants in the last three years, from 460 kg CO2/MWh in 2015, to 391 kg CO2/MWh in 2016 and to 388 kg CO2/MWh in 2017.

The main greenhouse gas generated by the Company's activities is CO2, from combustion during thermal power generation. Iberdrola has made a pledge to the public to remain amongst the main European companies with the fewest CO2 emissions per kWh. The Company's strategy is essentially to gradually cut back on its GHG emissions by continuing to generate power from renewable sources, while gradually incorporating the most efficient and least carbon intensive technologies at its existing facilities.

(1) Obtained by dividing emissions by the total net production, including steam production.

(2) Source: European carbon factor Benchmarking of CO2 emissions by Europe's largest electricity utilities (January 2018, PwC).

(*) 100% of Neoenergia has been considered in the years 2016 and 2017.

(**) The group has a large hydroelectric production capacity. Annual production using this technology depends on rainfall and the capacity of reservoirs during certain periods, which vary greatly. Consequently, the use of other technologies in global production also varies.