The world population growth rate must slow down significantly to avoid reaching unsustainable levels, says a new UN report. The World Demographic Trends Report was prepared by the UN Population Division and summarised by BBC News, Science and Environment:-
"To have a reasonable chance of stabilising world population, fertility must drop to below 'replacement level'.
It must then be maintained at that level for an extended period, says the report.
This replacement level is the fertility level at which a population replaces itself from one generation to the next.
The world population is already poised to reach 7 billion later this year and this figure potentially could double to 14 billion by 2100 if action is not taken.
This is of particular concern for the least developed countries worldwide, which are growing at the fastest rate and are already the most vulnerable to famine".