Global Citizen is turning to cities as it looks to break through what it sees as widespread political gridlock hindering ...

The argument that a growing headcount is bad for the planet obscures the climate solutions that can be drawn from the power ...

Explore how smart cities are integrating digital, social, and environmental values to meet the World Bank's 2050 urban ...

Lake Champlain’s lake trout population is now self-sustaining, a goal that has been in the works for more than 50 years.

In 1989, the United Nations established 11 July after the global body inspired by the world population hitting five billion on 11 July 1987.

What if the challenge for humanity’s future is not too many people on a crowded planet, but too few people to sustain the ...

Far more families are choosing to have fewer — or no — children. Many countries, including the U.S., now face a rapidly aging ...

This year will bring "another significant decline of the birth rate" for the majority of countries, new analysis shows.

The population of the United States has grown almost 123 times since the first federal census was conducted after the Declaration of Independence.

We’ve all heard that human overpopulation is a crisis. In 2017, Bill Nye warned us about the planet’s “people problem,” and ...

Vital Records Index NYC reports global population is set to peak at 10.3B by 2080s, then decline, prompting economic and ...

Hundreds of decisions—how to build roads, where to send medicine, how to plan for natural disasters—depend on knowing where people live. Over the past few decades, population maps have become powerful ...