As global population rises, projected to reach 7 billion in October 2011, so does the population of the world's cities. Thousands of young people live as homeless on the streets of Mexico City, the world's eighth largest city. Many of them, who had fled their homes because of lack of jobs or family violence now find themselves in squalid and often dangerous conditions.

As the world's population pushes towards 7 billion, its second most populous country India continues to face rapid rural to urban migration, as millions of people continue to seek better economic opportunities in its already over-populated cities.

This video documents a programme in Honduras that is enlisting police officers in a broad-based struggle to address domestic violence.

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This episode of De Rode Loper - a Belgian show business programme - features Natalie Imbruglia and Goedele Liekens, who speak about their involvement in the UNFPA-led Campaign to End Fistula.

This episode of Splash - a Belgian show business programme - features Natalie Imbruglia and Goedele Liekens, who speak about their involvement in the UNFPA-led Campaign to End Fistula.

The United Nations Population Fund is the lead agency in the UN system supporting national efforts to conduct censuses, particularly in developing countries. A census is among the most important and complex peace-time exercises a nation can undertake. Read more on data for development: http://bit.ly/GBDqWX

Janice Banaag, 18, lives with her husband and baby underneath a Manila bridge. The State of World Population 2007 report stresses the need to provide housing and healthcare, including family planning, for the urban poor.