jno "But the answer is still China
https://www.bbc.co.uk/news/world-asia-57018837 "
That article starts "China emits more greenhouse gas than the entire developed world combined, a new report has claimed."
https://en.wikipedia.org/wiki/Developed_country#/media/File:Imf-advanced-un-least-developed-2008.svg
it is replete with 'data' from a New York advisory group/think tank( Rhodium Group) and a European think tank (Global Carbon Project 2020)
but the BBC article does mention:
"The Asian giant has the world's largest population, so its per person emissions are still far behind the US, but the research said those emissions have increased too, tripling over the course of two decades." ..... just to keep it all balanced, right ?