Thank you for this. I have just discovered your writing here on Medium and am enjoying the knowledge you have on offer.

I have a question for you concerning a statement you made with regard to the size and population of Greenland. You wrote, "Greenland's population is roughly the size of Pittsburgh City, California."

I live in the San Francisco Bay Area, where we have something like 100 different municipalities, including one, Pittsburg, with a population of 72,000.

https://en.wikipedia.org/wiki/Pittsburg,_California

Is that what you meant when you wrote "Pittsburgh City"?