Other estimates range as high as 35 million. Even our population projections must be continually revised as variables controlling human population growth continually change. Past projections have been significantly higher because they hadn t taken into account advances in family planning in many countries. Some are very pessimistic about our ability to control population growth. But there is room for optimism especially if we can recognize that there is a problem, discuss options for reducing growth, and implement those options.
World population is projected to level off somewhere above ten billion.
That s almost twice as many people as we have on earth now. Population growth is an issue that people often don t like to talk about.