At 4°C of warming, would a billion people survive? What scientists say.

https://www.climatecodered.org/2019/08/at-4c-of-warming-would-billion-people.html

https://climatesafety.info/wp-content/uploads/2017/07/4dg-map-new-scien2009_800px.jpg

https://www.theguardian.com/environment/2019/may/18/climate-crisis-heat-is-on-global-heating-four-degrees-2100-change-way-we-live

https://www.pnas.org/content/115/33/8252

https://climateextremes.org.au/wp-content/uploads/2018/08/What-Lies-Beneath-V3-LR-Blank5b15d.pdf

https://www.counterpunch.org/2019/08/23/earth-4c-hotter/