1. IEA (International Energy Agency) (2020b). Transport: Improving the sustainability of passenger and freight transport. https://www.iea.org/topics/transport.
2. Statista (2020) U.S. light duty vehicle GHG emissions from 2005 to 2018. https://www.statista.com/statistics/922663/us-light-duty-vehicle-ghg-emissions/.
3. IEA (International Energy Agency) (2020c) World Energy Model. https://www.iea.org/reports/world-energy-model/sustainable-development-scenario.
4. EPA (Environmental Protection Agency) (2020) Data on Cars used for Testing Fuel Economy. https://www.epa.gov/compliance-and-fuel-economy-data/data-cars-used-testing-fuel-economy.
5. European Commission (2020a) Climate Action: News. https://ec.europa.eu/clima/news/average-CO2-emissions-new-light-duty-vehicles-registered-europe-2019_en.