When the World's Population Reached 6 Billion in 1995, It

Multiple Choice

When the world's population reached 6 billion in 1995, it was forecast that at a steady rate of growth the population would reach 12 billion in approximately 45 years. That period of 45 years is known as

A) doubling time.
B) doubling life expectancy.
C) double increase rate.
D) double overpopulation.
E) double demographic transition.