I add about 1/2 cup of baking soda to every load of laundry. We have pretty hard water. The baking soda softens it so that it is more effective at washing away the detergent. Been doing this for a couple of years and I have noticed that our towels don't lose absorbency like towels we've had in the past.
The average number of children each woman will have over the course of her lifetime is called the Fertility Rate In 2011, the overall global life expectancy for both men and women was
In much of the developing world, demographic change has contributed to economic growth and reductions in poverty. Over the last 40 years, women are having fewer children, from 4.7 children per woman in 1970 to an average of 2.5 children today. Total fertility rates (TFRs) range from 1.1 in Taiwan to 7.4 in Niger. In 1970, just under one-half (48 percent) of the world's population was younger than 20, a nearly equal percentage was ages 20 to 64, and only 5 percent was 65 and older.