More than a third of 50 recently surveyed Nobel laureates cited “population rise / environmental degradation” as the biggest threat to humankind. Second on the list was “nuclear war ...

Population ecology is the study of how populations — of plants, animals, and other organisms — change over time and space and interact with their environment. Populations are groups of ...

Consumption by children and to some degree by the old is covered by prime-age adults—those roughly 25 to 59—who produce more than they consume (see Chart 1). As a population ages, the proportion of ...

Population numbers were kept low because of the difficulty of finding food. The development of agriculture led to a population explosion that has accelerated enormously during the past 500 years.

The population of the world was relatively low and steady until the 1950s when there was a population ‘explosion’. Since then, there has been a rapid increase in the world’s population so ...

They portend an imminent transition to a labor-short economy. The United Nations projects that aging and declining fertility will result in a smaller working-age (15–64) population in less than a ...

The recent growth helped push Limestone County into the top 10 in Alabama for total population, passing Calhoun County. Limestone is now home to an estimated 118,942 people. Baldwin County ...