“The size of the U.S.’s pipelines if each fluid produced or consumed in the U.S. had to be carried by a single pipe.”
Click on the image for a larger, clearer view. Note that the small horizontal rectangle with toothpaste at the upper left just is a very small inset from the vertical rectangle below it. A blog called Explain XKCD has discussed that image. I had no idea that we apparently make almost equal amounts of toothpaste and salsa.
Another of his comics reshuffled the United States Map so Ohio was in the Pacific Northwest, Idaho was down on the Gulf Coast, and Illinois was where Florida belongs.