Most of the world has dirty air, with just 17% of global cities meeting WHO air pollution guidelines, a report Tuesday found.

The global population has reached 8 billion, what does this mean for the future of our world? Dr. Rachel Snow of the United Nations Population Fund is here to answer your questions.

As the theme of this year’s World Population Day reminds us, investing in data collection is important to understanding problems, tailoring solutions, and driving progress. So is finance.

As the world’s population increased five-fold since the start of the 20th century, the changes in the geographic distribution of the billions of people across the planet have been ongoing and signific ...

Welcome to the world of population projections. Estimates from highly respected demographers suggest that the United States of the future might be less populous than that of the past. Those ...