Looks like in 2014, 40% of the population lived in coastal counties, making up 10% of the land.
Looks like in 2014, 40% of the population lived in coastal counties, making up 10% of the land.
https://oceanservice.noaa.gov/facts/population.html
https://www.census.gov/newsroom/press-releases/2015/cb15-33.html
I'm not sure why they're talking about it purely in terms of blast radius. The blast radius of my farts is pretty small but you can still smell them from a different room.
Also "if 2000 1 megaton bombs detonated, it would only destroy 5% of the US", is purely talking about blast radius, but when you consider what 5% of the US actually looks like, that's a lot of people. I wouldn't be surprised if two thirds of the US population lives within 5% of the total land mass.