one pound of soap per week per person?
It takes me about 6 months to use a pound of soap.
That's about 1/2 oz per week.
So, someone else has to make up the difference of my low usage
The pound per week number came from a speaker from the L5 Society back in '76. "That pound a week" includes all uses: hygeine, dish soap, laundry detergent, the stuff floors are mopped with, industrial usage, etc. The number is based on annual consumption divided by the number of consumers.
I just checked and it looks like per-capita consumption has actually slightly increased. (What I haven't found are numbers on what percentage of that soap weight is water--are they including the water weight of liquid soaps, etc? What percentage of soap consumption is met by synthetics rather than traditional saponification of bio-based oils?)
The yield numbers for cropland, oil production, etc, were sourced from fairly-recent USDA numbers. I pulled the numbers up when considering how realistic some of the current promoters' projections are on crop yields in a "food vs feed vs industrial use" sense. (I've long believed that if we want to build a functional self-supporting space station or extra-planetary colony, the development team needs to include a bunch of retired farmers who have dealt with many of these problems before.)
The analogy of a double-crewed
Gato-class sub is my own, based on per-capita cubic footage of some of the proposed transport vessels and colonies. Even as a child watching
Star Trek re-runs, I had trouble accepting the size of the hallways and height of the ceilings on the
Enterprise.