OurWorldInData: Webpage - GitHub repo (owid-co2-data.csv)
Data "cleaning" (selecting information potentially useful for this project specifically): https://github.com/Rokkaan5/5622-PublishedCode/blob/fe182f76b9cf4c4a36df3fedb83a41858f6fbade/DataPrep-and-EDA/OWID-co2-data.py
The data was a csv with various information (including specific countries, as well as general world data)
Selected only general world data, and selected specific potentially useful columns
Most of missing data are up to certain years.