Well, the standard temperature unit is Celsius, so Fahrenheit is rare and used just by a few obscure countries: https://en.wikipedia.org/wiki/Fahrenheit#Usage h

Well, the standard temperature unit is Celsius, so Fahrenheit is rare and used just by a few obscure countries: https://en.wikipedia.org/wiki/Fahrenheit#Usage https://en.wikipedia.org/wiki/Fahrenheit#Usage -- and USA. You are more likely to be in a country that has banned anti-personnel land mines than one using Fahrenheit.