John Tanton: Demographic Momentum
Tanton Video Interview Interview 2006 - Topic 9
This topic includes a discussion of demographic momentum (also referred to as population momentum), where populations continue to grow even after replacement level fertility is reached. This is due to the younger topic of the population entering their childbearing years, so the population continues to grow for approximately a generation.
Dr. John Tanton discusses China's one-child policy and India's lack of such a policy - India has yet to make this demographic transition.