Methane emissions (kt of CO2 equivalent) - BulgariaClimate Watch Historical GHG Emissions ( 1990-2020 ). 2023. Washington, DC: World Resources Institute. Available online at: climatewatchdata.org/ghg-emissionsLicense : Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) LineBarMapAlso ShowNoneAggregatesSame regionSimilar valuesHighest valuesLowest valuesEmissions by GasShareDetailsLabel