With the amount of soot kicked up, recent (2018?) simulations show the entire Northern Hemisphere will get dark, nothing will grow for 5-10 years, and the great plains will be colder by 100(F) degrees (admittedly the worst, but most other places are 60-80 degrees colder.<p>Go south, quickly. Mexico fares okay, but everything in the southern hemisphere does much better.<p>At the start of the Russian offensive against Ukraine, someone published a paper, imagining a scenario of a flood of lucky (imo) people flooding into South America and what indigenous plants (and probably most animals)<p>A small nuclear exchange will cut protein production by 7% for years:
<a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7132296/" rel="nofollow">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7132296/</a><p>My pick for a place to comfortably survive a nuclear war in this world (possibly global warming as well) would be Montevideo Uruguay.