Paul Ehrlich scared a lot of people with his book "The Population Bomb" in 1968.
That same year, the group ZPG--Zero Population Growth--was born. The dire predictions Ehrlich laid out have largely not come to pass--some people say "yet"--but the concern about the world getting overpopulated remains.
ZPG is still on the scene, but with a different name: . CEO John Seager joins us for a talk about population growth and demographic trends in our part of the world.
