world population

As the population climbs, the issue of sewage becomes more pressing.

The top countries for poor sanitation, by number of people without access to sanitary sewage facilities.

Could you be the Earth's 3 billionth baby?

As of today, humanity is in debt to Earth's 2011 resources.

The UN compiles a mind-boggling array of demographic, health and census data in order to estimate the world population.

From rising seas to a slight increase in Earth's rotation, find out when it'll all go down.

Genetic evidence shows that culture, population growth influencing evolution.