Those of us concerned with the human population situation are often confronted with the mesmerism of numbers. There is a general human inability to comprehend and relate to numbers that run into the millions and billons. World population is now increasing about 81 million per year. How can this be put into terms that we can grasp more easily?
One way is to break the 81 million per year rate down into smaller units of time that are closer to our ordinary experience. For instance, that number of new people reduces to:
221,400 per day
9,220 per hour
154 per minute
The 154 per-minute rate is within the range of most metronomes, which run up to about 200 strokes per minute. The metronome I like best is a Wittner MT-50. It has three modes: sound only, flashing light only, and both together. It costs about $30.00.
I sometimes start a metronome running, using both light and sound, at the beginning of a talk and explain the idea of relating population growth to time. Then since the noise is distracting, I shut off the sound and just leave the light flashing during the speech. Then I turn the sound back on at the end of my remarks to remake the point about the rate of increase.
It should be noted that the 81 million per year figure is the net increase. There are actually five births (137 million) for each two people that die (57 million). The 137 million newcomers need the expenditure of many resources to make them into productive citizens. The 57 million who exit the scene in effect take with them most of the resources expended in their development. The old saying that “you can’t take it with you” is dramatically wrong. For the most part, we cannot leave behind any useful residual of the resources we used in our lifetimes.
Every day it becomes more imperative that we do all we can to grasp the reality of the constant growth of world population and its effects on the resources of the planet, as well as the nature of our lives together.
If it took you 60 seconds to read this page, approximately 154 people were added to the earth’s population in that time!P.S. If you’d like to try this teaching tool, and your local music store doesn’t have a suitable metronome, there are several websites on the Internet where one can be ordered. If you search “Wittner MT-50,” several choices pop up. Or if you prefer, I’d be happy to order one for you. [Contact the author at this website.]