1. U.S. EIA Today in energy (2019). Available:https://www.eia.gov/todayinenergy/detail.php?id=39092[11 May 2019].
2. U.S. EIA Primary energy review (2020). Available:https://www.eia.gov/totalenergy/data/monthly/pdf/sec1_3.pdf[4 July 2020].
3. U.S. EIA Global greenhouse gas emissions data (2019). Available:https://www.epa.gov/ghgemissions/global‐greenhouse‐gas‐emissions‐data[4 July 2020].
4. U.S. EIA Sources of greenhouse gas emissions (2020). Available:https://www.epa.gov/ghgemissions/sources‐greenhouse‐gas‐emissions#:~:text=Carbondioxide(CO2) makes natural gas%2C to produce electricity [24 August 2020].
5. U.S. EIA Diesel fuel explained (2020).https://www.eia.gov/energyexplained/diesel‐fuel/use‐of‐diesel.php[20 August 2020].