David Woodfall / Young woman fishing for shrimp fry, looking in net to see the catch, Ganges Delta, Bangladesh, November 2008

David Woodfall / Large numbers of children fishing for shrimp fry on coastal margin land damaged by typhoon Sidr in November 2007, Sundarbans, Bangladesh, October 2008

Ashley Cooper / Woman carrying a load of foliage from the surrounding forest to feed goats and cows. Annapurna, Himalayas, Nepal, December 2012

Ashley Cooper / Subsistence farming in the Annapurna Himalayas in Nepal. The terracing has been developed over centuries to farm this steep mountain land.

Ashley Cooper / Villagers in a remote subsistence farming village on an island in the Sunderbans, the Ganges Delta in Eastern India. December 2013.

Ashley Cooper / Aerial view of flooded farmland around Makhanga, which two months after the January 2015 floods, is still cut off after rail and road connections were washed away. Malawi, March 2015.

Ashley Cooper / Aerial view of flooded farmland around Makhanga, which two months after the January 2015 floods, is still cut off after rail and road connections which were washed away. Malawi, March 2015.

Ashley Cooper / Aerial view of flooded farmland around Makhanga, which two months after the January 2015 floods, is still cut off after rail and road connections were washed away. Malawi, March 2015.

Ashley Cooper / Aerial view of flooded farmland around Makhanga, which two months after the January 2015 floods, is still cut off after rail and road connections were washed away. Malawi, March 2015.

Ashley Cooper / Aerial view of flooded farmland around Makhanga, which two months after the January 2015 floods, is still cut off after rail and road connections were washed away. Malawi, March 2015.

Ashley Cooper / Aerial view of flooded farmland and roads after the January 2015. Makhanga, Malawi. March 2015.

Ashley Cooper / Aerial view of land flooded by the January 2015 floods with washed away road, near Makhanga, Malawi, March 2015.

Ashley Cooper / Flood waters and farmland destroyed after the January 2015 flooding, Malawi, March 2015.

Ashley Cooper / Farmland flooded and covered in debris after the January 2015 flooding, Malawi, March 2015.

Ashley Cooper / Farmland flooded and covered in debris after the January 2015 flooding, Malawi, March 2015.

Ashley Cooper / Farmland flooded and covered in debris after the January 2015 flooding, Malawi, March 2015.

Ashley Cooper / Farmland flooded and covered in debris after the January 2015 flooding, Malawi, March 2015.

Ashley Cooper / Woman subsistence farmer cooking on a traditional clay oven, using rice stalks as biofuel in the Sunderbans, Ganges Delta, India. 2013.

Ashley Cooper / Woman subsistence farmer cooking on a traditional clay oven, using rice stalks as biofuel in the Sunderbans, Ganges Delta, India. December 2013.

Ashley Cooper / A woman subsistence farmer cooking on a traditional clay oven, using rice stalks as biofuel in the Sunderbans, Ganges Delta, India. All parts of the rice crop are used, and the villager's life is ver...

Ashley Cooper / Woman cooking on a traditional clay oven, fuelled by biofuel (rice stalks) Sunderbans, Ganges Delta, Eastern India. December 2013.

Ashley Cooper / Woman cooking on a traditional clay oven, fuelled by biofuel (rice stalks) Sunderbans, Ganges Delta, Eastern India. December 2013.

Ashley Cooper / Looking down from the air onto rice paddies in the Shire Valley, Malawi, Africa.

Ashley Cooper / Looking down from the air onto rice paddies and Maize crops in the Shire Valley, Malawi, Africa.

Ashley Cooper / Woman drying her rice crop in the Sunderbans, Ganges, Delta, India. December 2013.

Ashley Cooper / Rice crop drying, Sunderbans, Ganges Delta, India. December 2013.

Ashley Cooper / Rice crops harvested by hand in the Sunderbans, Ganges, Delta, India. December 2013.

Ashley Cooper / Woman carrying Rice crops harvested by hand in the Sunderbans, Ganges Delta, India.

Ashley Cooper / Man carrying Rice crop harvested by hand in the Sunderbans, Ganges Delta, India. 2013

Ashley Cooper / Village woman putting rice crop into container in a remote subsistence farming village on an island in the Sunderbans, the Ganges Delta, Eastern India. December 2013.

Staffan Widstrand / Woman raking soil of her vegetable plot, subsistence farming, Lithuania, May 2015.

Warwick Sloss / Subsistence farmer on small exposed area of land in Ganges-Brahmaputra delta used for cultivating rice crop, Bangladesh

David Pike / Subsistence farming on the slopes of plateau, Simien Mountains NP, Ethiopia

Eric Baccega / Korowai man cutting a sago trunk for the sago harvest, Western Papuasia, Indonesia. 1999 / 2000. (West Papua).

Eric Baccega / Koroway man cutting a sago trunk for the sago harvest, Western Papuasia, Indonesia. 1999 / 2000. (West Papua).

Pete Oxford / Salasaca Indians planting seeds in newly ploughed field, Salasaca, Andes, Ecuador 2004

Jabruson / Deforestation of national park for subsistence agriculture, Kinigi district, Parc des volcans NP, Rwanda

Jabruson / Deforestation of national park for subsistence agriculture, Kinigi district, Parec des Volcans NP, Rwanda

Jabruson / Tropical rainforest cleared for subsistence farming, Ruhengeri district, Rwanda

Jabruson / Gishwati forest reserve cleared for agriculture after civil war, Ruheneri district, Rwanda 2003

Jabruson / Area on edge of Bwindi NP cleared for banana crops, Uganda

Jabruson / Man cutting down tree with axe - for timber and then for subsistence farming on edge of Bwindi National Park, Uganda

Jabruson / Tropical rainforest cleared for subsistence farming and Eucalyptus trees, Ruhengeri, Rwanda

Jabruson / Deforestation for timber and to make way for subsistence farming on edge of Bwindi NP, Uganda

Jabruson / Subsistence farming (banana plantations) on deforested land Ruhengeri District, Rwanda - deforestation during and after civil war of 1990-94