WordNet
n. increase in the number of people who inhabit a territory or state
Wikipedia
In biology, population growth is the increase in the number of individuals in a population.
Global human population growth amounts to around 75 million annually, or 1.1% per year. The global population has grown from 1 billion in 1800 to 7 billion in 2012. It is expected to keep growing, where estimates have put the total population at 8.4 billion by mid-2030, and 9.6 billion by mid-2050. The nations with rapid population growth generally have low standards of living, whereas those nations with low rates of population growth have high standards of living.
colspan=3 align="center" style="background-color: #cfb;" | Population
Years Passed
Usage examples of "population growth".
The quality of life is deteriorating in direct correlation with population growth, but until lately you could find only a handful of Florida politicians willing to come out and say so.
That population growth also proves unsurprising when one stops to consider the actual numbers.
The census figures indicate a population growth rate of 33 percent over ten years, a very high rate of population growth by itself.
A mass, unconscious choice was being made between limiting population growth to match the resources available, as the hunter-gatherers of the past had done, or trying to increase food production to feed a growing population.
Unchecked population growth would quickly exhaust the capacity of the planet, so something checks it: competition for limited resources.
For instance, the current pattern of urban population growth won't continue much past the turn of the century.
After all, there are an infinite number of inhabited Earths, and we can't be the only one that has decided to solve the problem of unlimited population growth by expanding into the worlds of probability.
A major one is that population growth is pressing too hard on depleted resources.
It's perilous and foolhardy for the average citizen to remain ignorant about global warming, say, or ozone depletion, air pollution, toxic and radioactive wastes, acid rain, topsoil erosion, tropical deforestation, exponential population growth.