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2. United Nations Framework Convention on Climate Change, 2015, https://unfccc.int/process-and-meetings/the-paris-agreement/the-paris-agreement.
3. International Energy Agency, 2015, https://www.iea.org/reports/world-energy-outlook-2015.
4. Annual Energy Outlook 2015 with projections to 2040, U.S. Energy Information Administration (2015) DOE/EIA–0383(2015).
5. International Organization of Motor Vehicle Manufacturers, 2019, http://www.oica.net/category/climate-change-and-co2/.