This was turned into a computer model, which predicted population collapse.

As a result of war fatalities and famine, the annual population growth rate dropped dramatically, eventually leading to population collapse.

Epidemic disease is commonly cited as the primary reason for the population collapse.

They were facing a catastrophic population collapse.

Research is needed to discover the causes of the population collapse.

As the global population is still rising, economic, and probably social and population collapse are then inevitable.

The population collapse has resulted in large numbers of abandoned homes and commercial buildings, and areas of the city hit hard by urban decay.

The cause of this population collapse is thought to be overfishing, though pollution and disease may have played a part.

Another Vanguard documentary featured a look at Japan's impending population collapse.

The smooth lanternshark's slow rates of reproduction and growth may render it vulnerable to population collapse under sustained fishing pressure.