1. Carbon Dioxide | Vital Signs – Climate Change–Vital Signs of the Planet, (n.d.). https://climate.nasa.gov/vital-signs/carbon-dioxide /(accessed April 1, 2021).
2. How the World Passed a Carbon Threshold and Why It Matters - Yale E360, (n.d.). https://e360.yale.edu/features/how-the-world-passed-a-carbon-threshold-400ppm-and-why-it-matters (accessed May 1, 2021).
3. CO₂ and Greenhouse Gas Emissions - Our World in Data, (n.d.). https://ourworldindata.org/co2-and-other-greenhouse-gas-emissions#future-emission-scenarios (accessed January 20, 2020).
4. World Energy Outlook 2019 – Analysis - IEA, (n.d.). https://www.iea.org/reports/world-energy-outlook-2019 (accessed January 20, 2020).
5. Lazard.com | Levelized Cost of Energy and Levelized Cost of Storage 2018, (n.d.). https://www.lazard.com/perspective/levelized-cost-of-energy-and-levelized-cost-of-storage-2018 /(accessed January 20, 2020).