This little graph shows the increase in human
numbers in the last few thousand years. In this case, the distance from 1,000
million to 7,600 million is 7.6 times the distance from zero to 1,000 million.
7.6 billion is demographers' mid projection. Graph curve is from Learning
Tools, KQED TV, San Francisco, a PBS educational tv station. Overpopulation
denialists right and left have asked about the source, so now you know. The
leader of the Task Force on Amphibian Decline living in Britain objected
calling the graph extreme and, "off the scale." But it isn't. It is simply
demographer's mid projection.
Usually when such a graph is drawn, a short
time scale is used. But an evolutionarily significant time scale can more
easily show relevant amounts of increase per unit of time.
The distance from 1,000 million to 7,600
million is 7.6 times the distance from zero to 1,000 million. The graph is an