1. European Parliament, “CO2 emissions from cars: facts and figures (infographics)”, https://www.europarl.europa.eu/news/en/headlines/society/20190313STO31218/co2-emissions-from-cars-facts-and-figures-infographics, 2021 (accessed on April 25, 2021).
2. United States Environmental Protection Agency, “Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2018”, EPA 430-R-20-002, 2020.
3. The European Parliament and the Council of the European Union, “Regulation (EU) 2019/631 of the European Parliament and of the Council of 17 April 2019 setting CO2 emission performance standards for new passenger cars and for new light commercial vehicles, and repealing Regulations (EC) No 443/2009 and (EU) No 510/2011”, 2021.
4. United States Environmental Protection Agency and National Highway Traffic Safety Administration, “The Safer Affordable Fuel-Efficient (SAFE) Vehicles Rule for Model Years 2021-2026 Passenger Cars and Light Trucks”, 2020.
5. Korea Energy Agency, “2020 Vehicle Fuel Economy and CO2 Emissions: Data and Analyses”, 2020.