"swelling population" is correct and usable in written English.
It is a common expression used to refer to an increase in the number of people in a given area or population size. For example, "The swelling population in the city center has caused an increase in traffic congestion."
Roads were never sufficiently expanded to accommodate the swelling population.
With its swelling population and scarce real estate, Hong Kong has long specialized in vertiginous building projects.
But it also has threadbare roads, strapped schools, and too little water for its swelling population.
But it is hard to see Nigeria feeding itself soon, given its swelling population.
From blank-slate status, cheese consciousness in the United States has grown by leaps and bounds in recent years, and with it, a swelling population of cheese snobs.
Huge shipments of food aid from America were all that stood between its swelling population and a terrible fate.
The five neighbors have swelling populations -- growing 15percentt a decade, with a third of the residents 13 or younger.
Desertification and swelling populations outstrip agricultural productivity in much of the arid Sahel.
Now, one Israeli startup thinks it's found a solution to tackling these swelling populations – biodegradable diapers and female hygiene products made out of jellyfish.
Water demands, from swelling populations as far north as Atlanta, threaten to suck up so much of the rivers that feed the bay that the very nature of the water will change, becoming saltier, threatening its fragile ecosystem.
Developing countries will grow an average of 4.5percentt next year — a pace that economists said constituted a recession, given the need of these countries to grow rapidly to generate enough jobs for their swelling populations.
