The go-to people regarding #humanextinction are not philosophers. The go-to people are engineers especially in petrochemicals. I want to say: read a book! Specifically,
#AlanWeisman 's The World Without Us (2007). Weisman, unlike such sage philosophers as William (best friend of Elon Musk) Macaskill and Derek Parfitt, actually noticed a few things. For instance, he noticed the petrochemical industry and infrastructure. https://limitedinc.blogspot.com/2023/03/longtermism-its-gas.html