Indicator 2.1, regarding greenhouse gas emissions, has been updated. 
Greenhouse gas emissions are converted into carbon dioxide values ​​due to the operations of the power plants in Bjarnarflag, Krafla, and Þeistareykir. At the beginning of Gaumur´s monitoring period in 2011, a total of 42,527 tonnes of carbon dioxide values ​​was emitted from the power plants. In 2020, there were 30,677 tonnes of carbon dioxide equivalents. A large part of the emissions is carbon dioxide and a small amount is methane emissions. The amount of methane is converted to carbon dioxide value, where 1 kg of methane is equivalent to 25 kg of carbon dioxide. There is a significant difference in emissions between the three power plants, determined by the regions themselves, their geology, and the type of geothermal area. There is more gas in the steam at Krafla than in Þeistareykir. It explains more greenhouse gas emissions at Krafla than in Þeistareykir. During the Krafla eruptions, the gas content in the steam increased, but it has been decreasing every year. Emissions from the Þeistareykir power plant have decreased since 2018, when they were 7,937 tonnes, compared to 6,123 tonnes in 2020. The total emissions of the Mývatn area (geothermal power plants in the area) are now only about 72% of what they were in 2011 when Gaumur's monitoring started.

Measurements of carbon dioxide emissions from PCC BakkiSilicon started in 2018. In the first three years that the factory has been in operation, only one year has been achieved with both furnaces in operation. The furnaces were not started until April 30 and August 31, in the first year of operation, and both were switched off in July 2020, due to the world market situation due to COVID-19 and the necessary maintenance of the furnaces. Total emissions for the 2019 operating year were 98,405t. Total emissions in 2020 were 58,966. The estimated annual emission at full capacity is 120,000 tons of carbon dioxide.