Laurie Campbell / Outfall from hydroelectric Laggan Dam, Lochaber, Scotland, UK, February

Luiz Claudio Marigo / Aerial view of artificial lake created by the Samuel Hydroelectric dam in Jamari River, near Porto Velho city, Rondnia State, Western Brazil.

Steven David Miller / Lake Argyle reservoir dam wall and outflow, aerial view. Reservoir dammed in 1971 for Ord River Irrigation Scheme. The Kimberley, Western Australia. 2017.

Rick Price / Lake Argyle reservoir, part of Ord River irrigation scheme. Hydro electric power generation at dam. The Kimberley, Western Australia, 2015.

Rick Price / View from Ord River Dam, looking downstream through river valley. Lake Argyle, The Kimberley. 2016.

Laurie Hedges / Tracking shot showing a large area of rainforest flooded by a hydroelectric dam in the southern reaches of the Amazon, Brazil, 2019.

David Kjaer / Almendra hydroelectric dam, also known as the Villarino Dam, on the Rio Tormes, Salamanca, Spain. June.

Steve O. Taylor (GHF) / Site of dam construction, Sabah, Malaysian Borneo. June 2010.

Steve O. Taylor (GHF) / Site of dam construction, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Site of dam construction, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Blue print of Dam construction, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Tempory houses for Dayak people evicted for dam construction. Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Deforested area in Sabah, for dam construction. Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Dayak people, woman with baby, evicted from home for dam construction, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Dayak man evicted from home for dam construction, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Dayak people, children playing in longhouse, evicted from home for dam construction, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Dayak people, man with basket bag, evicted from home for dam construction, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Dayak man, evicted from home for dam construction, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Dayak people evicted from home for dam construction, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Deforested logs for export, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Temporary longhouses built for Dayak people, rehoused by government for dam building project. Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Dayak man, with western style tattoos, rehoused by government for dam building project, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Dayak woman cooking, rehoused by government for dam building project. Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Dayak man with stretched ears, rehoused by government for dam building project. Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Dayak man, with stretched ears, rehoused by government for dam building project. Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Deforestation for construction of dam, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Deforestation for construction of dam, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Deforestation for construction of dam, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Deforestation for construction of dam, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Deforestation for construction of dam, Sabah, Malaysian Borneo. July 2010.

Steve O. Taylor (GHF) / Road to dam during construction, Sabah, Malaysian Borneo. June 2010.

Wild Wonders of Europe / Widstrand / Colourful paintings on dam, Stora Sjofallet hydro electric power station, Greater Laponia Rewilding Area, Lapland, Norrbotten, Sweden, June 2013.

Chien Lee / Dying rainforest trees flooded by large hydroelectric dam, Sarawak, Borneo, Malaysia

Chien Lee / Dying rainforest trees flooded by large hydroelectric dam, Sarawak, Borneo, Malaysia

Norbert Wu / Glen Canyon Dam on the Colorado River which generates hydroelectric power and the Glen Canyon Bridge, Glen Canyon National Recreation Area, Arizona

Luiz Claudio Marigo / Canyon of Sao Francisco River near Paulo Afonso town and the CHESF hydroelectric plant and dam, in northeastern Bahia State, northeastern Brazil. December 2009

Jerry Monkman / Comerford Dam and hydroelectric power station on the Connecticut River in Monroe, New Hampshire, USA. April 2007

James Christensen / John Day Dam, Columbia River, Oregon

Laurie Campbell / Outfall from hydroelectric Laggan Dam, Lochaber, Scotland, UK, February

Laurie Campbell / Outfall from hydroelectric Laggan Dam, Lochaber, Scotland, UK, February

Laurie Campbell / Outfall from hydroelectric Laggan Dam, Lochaber, Scotland, UK, February

Oriol Alamany / Gordon hydroelectric dam and reservoir, Southwest National Park, Tasmania, Australia, December

Luiz Claudio Marigo / Aerial view of the hydroelectric dam of Samuel, across the Jamari River, tributary of the right margin of Madeira River, near Porto Velho city, Rondônia State, Western Brazil.

Luiz Claudio Marigo / Aerial view of Samuel hydroelectric dam and lake formed by the dam, west of Porto Velho city, Northern Rondônia State, Western Brazil.

Luciano Candisani / Itaipu Dam, the largest in the world, Parana River near Iguacu Waterfalls, Brazil

Luciano Candisani / Machadinho Dam, small hydroelectic plant in Parana River, Brazil

Nick Gordon / Aerial view of Balbina Hydroelectric dam near Manaus, Brazil. It flooded 2400 sq km of rainforest when the dam was opened in 1982.

Gerry Ellis / Effluence from Bonneville Dam, Columbia River, Oregon

Gerry Ellis / Effluence from Bonneville Dam, Columbia River, Oregon

Gerry Ellis / Effluence from Bonneville Dam, Columbia River, Oregon

Norbert Wu / Glen Canyon Dam on the Colorado River which generates hydroelectric power and the Glen Canyon Bridge, Glen Canyon National Recreation Area, Arizona

James Christensen / John Day Dam, Columbia River, Oregon

Pal Hermansen / Aerial shot of the biggest Hydroelectric stone dam in Norway, Storglomvatnet Reservoir, Norway.

Pal Hermansen / Aerial panning shot of the biggest Hydroelectric stone dam in Norway, Storglomvatnet Reservoir, Norway.

Pal Hermansen / Panorama of hydroelectric power lake after drought and massive power production. Viken, Norway. August.

Pal Hermansen / Hydroelectric power dam lake drought and massive power production. Viken, Norway. August.

Pal Hermansen / Hydroelectric power lake after drought and massive power production. Viken, Norway. August.

Pal Hermansen / Hydroelectric power lake after drought and massive power production. Viken, Norway. August.

Morley Read / Rio Verde Chico Hydroelectric Project water intake, in rainforest. Rebuilt after extreme flooding of river due to abnormally heavy rainfall. Tungurahua province, Ecuador. December 2019.

Maxime Aliaga / View of rainforest from hydro electric dam, Batang Toru, North Sumatra

Alan Williams / Dam at Llyn Stwlan used for pumped storage hydroelectricity generation situated in the Moelwyn Mountains above Tanygrisiau reservoir near Blaenau Ffestiniog, North Wales, UK, April 2018.

Sylvain Cordier / 'Welcome to Amur falcon Capital' sign at Doyang Hydroelectric Dam, near to migration hotspot, Nagaland, India. October.