I believe megaregions is an economic concept. It is supposed to show concentrations of linked economic activity/common infrastructure/interests. The US has 11

I believe megaregions is an economic concept. It is supposed to show concentrations of linked economic activity/common infrastructure/interests. The US has 11 megaregions. https://en.wikipedia.org/wiki/Megaregions_of_the_United_States https://en.wikipedia.org/wiki/Megaregions_of_the_United_Stat...