- ---. Use of Coal. 2 June 2021, https://www.eia.gov/energyexplained/coal/use-of-coal.php.
- ---. Use of Natural Gas. 7 Dec. 2021, https://www.eia.gov/energyexplained/natural-gas/use-of-natural-gas.php.
- ---. Use of Oil. 10 May 2021, https://www.eia.gov/energyexplained/oil-and-petroleum-products/use-of-oil.php.
- “Key Terms You Need to Know to Understand Climate Change”. Climate Reality, 27 Oct. 2015, https://www.climaterealityproject.org/blog/key-terms-you-need-understand-climate-change.