Tom Gilks / Basic electric wiring linking homes in a slum with a diesel powered generator, Remba Island, Lake Victoria, Kenya.

David Woodfall / Woman walking through polluted slum, Dhaka, Bangladesh, July 2008

Ashley Cooper / Dwellings in Suihua with smoke coming out from the chimneys, Heilongjiang Province, China.

John Cancalosi / Kibera, one of Africa's largest slums, near Nairobi, Kenya, July 2017.

Gavin Hellier / Washing drying in the wind, Dhobi Ghats open air laundromat, Mumbai, India, 2011.

Tom Gilks / Man standing on corrugated roof in shanty town, Remba Island, Lake Victoria, Kenya.

Tony Phelps / Bongolethu, an unnofficial settlement. Little Karoo, Western Cape, South Africa, August 2011

Tim Laman / Aerial view of rooftops of basic housing and railway, San Jose, Cartago, Costa Rica.

Martin Dohrn / Aerial view of Bombay shanty town, Maharashtra, India

Luiz Claudio Marigo / Favela slums of Santa Marta Hill, Rio de Janeiro, Brazil

Nick Garbutt / Shanty town homes built on stilts Kota kinabalu, Sabah, Borneo, Malaysia

Fabio Liverani / Buses and other vehicles in the Bidonville slums of Lagos, Nigeria. 2002

Phil Savoie / Wooden houses beside Belize city canal, Belize, Central America

Fabio Liverani / Vegetable refuse from market stalls in the Bidonville slums of Lagos, Nigeria West Africa. 2002

Fabio Liverani / Beggars on railway bridge in the Bidonville slums of Lagos, Nigeria, West Africa 2002

Fabio Liverani / Street scene in the Bidonville slums of Lagos, Nigeria, West Africa 2002

Klaus Nigge / Aerial view of shanty town beside beach, Davao, Mindanao, Philippines, Celebes Sea, March 2007.