Tony Heald / Rag-picker woman following inbound rubbish trucks at landfill site, Guwahti, Assam, India, March 2009.

Tony Heald / Rag picker women and children going through rubbish at landfill site, Guwahti, Assam, India, March 2009.

Tony Heald / Indian women on landfill site, picking through the rubbish, with cattle, Guwahti, Assam, India, March 2009.

Tony Heald / Rag pickers on a landfill site with Greater adjutant stork (Leptoptilos dubius) in the background, Guwahti, Assam India, March 2009.

Tony Heald / Mother and child rag pickers in landfill site, Guwahti, Assam, India, March 2009.

Tony Heald / Rag-pickers tents and huts, with dumper truck passing by at landfill site, Guwahti, Assam. India, March 2009.

Tony Heald / Young rag-picker boy with sunglasses at landfill site, Guwahti, Assam, India, March.

Tony Heald / Indian woman in sari picking through rubbish a t a landfill site, Guwahti, Assam, India, March 2009.

Tony Heald / Young Indian rag-picker girl standing on a pile of rubbish in a landfill site, Guwahti, Assam, India, March 2009.

Tony Heald / Rag picker woman going through rubbish at landfill site, Guwahti, Assam, India, March 2009.

Tony Heald / Indian rag picker boys standing on rubbish heap in landfill site, Guwahati, Assam, India, March 2009.

Tony Heald / Rag-pickers, girl with elderly woman, at landfill site in, Guwahti, Assam, India, March 2009.

Tony Heald / Rag-picker woman watching as rubbish truck empties its load into landfill stie, Guwahti, Assam. India, March 2009.

Tony Heald / Rag-picker boy at landfill site, Guwahti, Assam, India, March 2009.

Tony Heald / Rag-picker women sorting through rubbish at landfill site, Guwahti, Assam, India, March 2009.

Tony Heald / Rag-picker boys at landfill site, Guwahti, Assam, India, March 2009.

Enrique Lopez-Tapia / Lalibela street at dusk. Ethiopia, December 2014.

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

Jabruson / Barefoot Mozambican children. Pemba to Montepuez highway, north-eastern Mozambique, November 2011.

Jabruson / Women primarily control the sale of charcoal and wood in Sao Tome market, Sao Tome, Democratic Republic of Sao Tome and Principe, Gulf of Guinea. Lack of cooking fuels puts pressure on natural resourc...

Jabruson / Women selling wood for fuel in Sao Tome market, Sao Tome, Democratic Republic of Sao Tome and Principe, Gulf of Guinea. Lack of cooking fuels puts pressure on natural resources and much comes from woo...

Jabruson / Women primarily control the sale of charcoal in Sao Tome market, Sao Tome, Democratic Republic of Sao Tome and Principe, Gulf of Guinea. Lack of cooking fuels puts pressure on natural resources and mu...

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

John Cancalosi / Cinnabar (HgS) Mercury sulfide, Poverty Peak Nevada. Only ore of mercury.

David Woodfall / Adults and children searching for recyclable objects in landfill site, Dhaka, Bangladesh, November 2008

David Woodfall / Scheme for providing tea for people searching landfill site for recyclable objects, Dhaka, Bangladesh, November 2008

David Woodfall / Adults and children searching for recyclable objects in landfill site, Dhaka, Bangladesh, November 2008

David Woodfall / Adults and children looking for recyclable objects in landfill site, Dhaka, Bangladesh, November 2008

David Woodfall / Children searching for recyclable objects in landfill site, Dhaka, Bangladesh, November 2008

David Woodfall / Adults and children searching for recyclable objects in landfill site, Dhaka, Bangladesh, November 2008

David Woodfall / Children looking for recyclable objects in landfill site, Dhaka, Bangladesh, July 2008

David Woodfall / Children looking for recyclable objects in landfill site, Dhaka, Bangladesh, July 2008

David Woodfall / Adults and children collecting recyclable objects from landfill site, Dhaka, Bangladesh, July 2008

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

David Woodfall / Teenagers and chidren collecting fresh water in industrial slum, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Women and children collecting clean water in industrial slum Bhopal Madyah Pradesh, India, November 2008

David Woodfall / Women and children queueing to collecting clean water in industrial slum Bhopal Madyah Pradesh, India, November 2008

David Woodfall / House in industrial slum, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Family outside house amongst industrial pollution in slum, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Family entering house in industrial slum, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Domestic pollution around stream in slum, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Domestic pollution around stream in slum, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Child plahing in stream amongst domestic pollution in slum with cattle in background, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Pig and dogs foraging amongst industrial and domestic pollution in stream in slum, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Industrial and domestic pollution around stream in slum, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Teenager looking for recyclable items in polluted stream in slum, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Blind boy with mother, blindness caused by the endemic effect of pollution / poor diet, industrial slum, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Woman embroidering cloth, part of a craft scheme to alleviate rural poverty, Ganges delta, Bangladesh, October 2008

David Woodfall / Blind boy, blindness caused by the endemic effect of pollution / poor diet, industrial slum, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Aerial view of developing world capital city, Dhaka, Bangladesh, November 2008

David Woodfall / Hindu woman washing son at well, village life, Madyha Pradesh, India, Asia, November 2008

David Woodfall / Shrimp fishing community threatened by rising sea levels caused by climate change, Sundarbans, Bangladesh, November 2008

David Woodfall / Children in slum housing over polluted water, Dhaka, Bangladesh, November 2008

David Woodfall / Street children searching for recyclable objects at landfill, Dhaka, Bangladesh, November 2008

David Woodfall / Children playing in drainage pipe in slum, Dhaka, Bangladesh, November 2008, November 2008

David Woodfall / Polluted water and slum, Dhaka, Bangladesh, November 2008

David Woodfall / Bangladeshi man cooking in slum, Dhaka, Bangladesh, November 2008

David Woodfall / Adult and child searching for recyclable objects in landfill site, Dhaka, Bangladesh, November 2008

David Woodfall / Woman embroidering cloth as part of a craft scheme to alleviate rural poverty, Ganges delta, Bangladesh, November 2008

David Woodfall / Woman weaving cloth as part of a craft scheme to alleviate rural poverty, Ganges delta, Bangladesh, November 2008

David Woodfall / Woman walking through narrow alleyway between buildings in slum, Dhaka, Bangladesh, November 2008

David Woodfall / Crab catching scheme initiated by NGO to alleviate rural poverty, Uttaran, Ganges sdelta, Bangladesh, November 2008

David Woodfall / Children playing in slums, Bhopal, Madhya Pradesh, India, November 2008

David Woodfall / Men with crabs in net caught as part of a crab catching scheme initiated by an NGO to alleviate rural poverty, Uttaran, Ganges delta, Bangladesh, October 2008

Lisa Hoffner / Children walking through roadside trash in Colombia, South America. February 2008

Pete Oxford / Golden-crowned Sifaka (Propithecus tattersalli) pair being fed by Malagasy man, critically endangered species, Daraina, North East Madagascar

Nick Gordon / Manual workers at work in Bon Futuro open cast tin mine, Rondonia State, Brazil, Amazonia

Pete Oxford / Family living in tiny shack, street scene from Calcutta, West Bengal, India

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

Staffan Widstrand / Cramped hillside terraced housing on stilts, Manaus, Brazil, South America

Karl Ammann / Ba'Aka pygmy child with empty plate, South East Cameroon. Once provided with extra meat for trade with their Bantu neighbours, today many of the pygmies' hunting grounds are empty - the result of incr...

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

Daniel Gomez / Young man sitting on the side of the street in Batopilas. Chihuahua, Mexico.

Daniel Gomez / Young girl sitting on the side of the street in Batopilas. Chihuahua, Mexico.

Jabruson / Rwandan women walk to market carrying goods on head, Ruhengeri, Parc des Volcans NP, Rwanda

Jabruson / Rwandan women walk to market carrying goods, Brickworks, Ruhengeri, Parc des Volcans NP, Rwanda

Jabruson / Rwandan women walking to market carrying goods on head, Brickworks, Ruhengeri, Parc des Volcans NP, Rwanda

Jabruson / Rwandan women walking to market carrying goods on head, Brick works, Ruhengeri, Parc des Volcans NP, Rwanda

Jabruson / Rwandan child sitting beside vegetable plot, Kinigi, Parc des Volcans NP, Rwanda

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

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 with scavenging goats in the Bidonville slums of Lagos, Nigeria, West Africa 2002

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

Jeff Rotman / Woman snorting cocaine. Lima, Peru.

David Woodfall / Domestic pollution around stream in slum with cattle in background, Bhopal, Madhya Pradesh, India, November 2008

Richard Du Toit / Shacks, Cape Town, South Africa

Mark Moffett / A farmer burns his agricultural field after harvesting the crop in a clearcut area in the forest, Usina Serra Grande, Atlantic Forest, Brazil

Mark Moffett / Squatters Jose and Carmosina Costa have built a house on the site of an abandoned cattle ranch in hopes that the government will give them part of the land which lies near the Poco Das Antas Biologica...

Gerry Ellis / River ghetto, Amazon River, Iquitos, Peru

Pete Oxford / People bathing in Hugli River Calcutta West Bengal India

Nigel Cattlin / Sterile / Barren brome (Bromus sterilis) grass weeds turning red and going to seed in a green Wheat (Triticum aestivum) crop.

Dave Watts / White kunzea (Kunzea ambigua). Tasmania, Australia. November.

Nigel Cattlin / Sterile or barren brome (Bromus sterilis) flower spike panicles

Claudio Contreras / Trash in the coastal lagoon used to construct irregular housing, Ria Celestun, Yucatan Peninsula, Mexico, January

Claudio Contreras / Trash in the coastal lagoon used to construct irregular housing, Ria Celestun, Yucatan Peninsula, Mexico, January