Other things that were used before toilet paper include: Hay, corncobs, sticks, stones, sand, moss, hemp, wool, husks, fruit peels, ferns, sponges, seashells, and broken pottery. 15. 70-75% of the world still doesnât use toilet paper because it is too expensive or there is not sufficient plumbing.
Propensity is defined as a natural tendency. An example of propensity is an inborn love for writing. pl. -Â·ties. 1  a natural inclination or tendency; bent.  Obs. favorable inclination; bias (for)
...of total income or of an increase in income that consumers save rather than spend on goods and services. The average propensity to save equals the ratio of total saving to total income; the marginal propensity to save equals the ratio of a change in saving to a change in income. The sum of the propensity to consume and the propensity to save always equals one ( see propensity to...