Human Population on the 50th Earth Day
The following is from an insert to a 1994 solicitation letter from the group Zero Population Growth (renamed Population Connection in 2002).
In the seconds it
takes you to read this sentence, 24 people will be added to the Earth’s
you’ve finished this letter, that number will reach 1,000.
Within an hour ... 11,000. By
day’s end ... 260,000.
go to bed two nights from now, the net growth in human numbers will be
enough to fill a city the size of San Francisco.
four million years for humanity to reach the 2 billion mark. Only 30 years to add a third billion. And now we’re increasing by 95 million every single year.
they call it the human race.
Answer the following questions. Write out the calculation you made in order to get each answer.
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original web posting: Tuesday, November 14, 2000
last modified: Tuesday, April 14, 2015