Overpopulation means having more people in an area than the available resources can reasonably support. When a region becomes overpopulated, there might not be enough food, clean water, housing, or jobs for everyone who lives there.

Think of it like a game of musical chairs: if you have twenty kids but only fifteen chairs, some people won't have a place to sit. A city becomes overpopulated when it grows so crowded that schools overflow, traffic jams last for hours, or families struggle to find affordable housing.

The word often appears in discussions about cities, countries, or even the whole planet. Some scientists worry about global overpopulation, meaning whether Earth has enough farmland, fresh water, and other resources for its growing population. Others point out that the real problem isn't always how many people there are, but whether resources are distributed fairly and used wisely.

What counts as overpopulation depends on circumstances. A small island with limited freshwater might be overpopulated with just a few thousand people, while a large country with abundant resources might comfortably support millions. The key question is always the same: can the environment and infrastructure support the people living there?