A review published in The Lancet looks at the opportunities to improve the lives of slum dwellers.
Ian Klaus, from the US State Department, looks at how the international community can harness the power of cities to tackle global challenges.
Philippa Nicole Barr argues, that with over half the world's population living in urban areas, the time has come to give people a greater say in their cities.
Watch the world’s 12 most populous nations change between 1950 and 2060.
50% of the world’s population lives in just 1% of its land.
An OECD report examines the economic impact of air pollution.
This interactive map shows five years of the global movement of people.
How different would the world look if it was viewed in terms of key information rather than just geography?
The world’s cities are booming and their growth is changing the face of the planet, according to a new UN report.
The focus of this year's World Population Day is 'Investing in the Teenage Girl'.
Figures show the UK has more citizens living overseas than any other EU nation.
These five charts show how, in many ways, life is getting better, not worse.
These charts show how the number of elderly people will continue to grow, while the working-age population will keep shrinking.
India’s rapidly growing population will soon overtake China’s to become the largest in the world, according to a United Nations report.
A new ranking looks at the quality of life of different nationalities.