An increase in the population of a region or country, often caused by higher birth rates or migration.
都市部では人口増加に伴って住宅や交通の問題が深刻になっている。
In urban areas, housing and transportation problems have become serious along with population growth.
政府は人口増加に対応するため、保育施設の拡充を進めている。
The government is expanding childcare facilities to cope with population growth.
一部の国では移民による人口増加が経済成長を後押ししている。
In some countries, population increase due to immigration is supporting economic growth.