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

Pete Cairns / Hydro electric dam on Loch Laggan, Scotland, UK

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

Ashley Cooper / Big green Footsteps sign on Eigg Harbour, Scotland, UK. May 2012

Ashley Cooper / Crofter and Eigg Electric employee amongst the array of backup batteries that store sufficient to power the island for 24 hours. Isle of Eigg is powered by renewable energy and backup batteries store...

Ashley Cooper / Solar panels on the Isle of Eigg which relies exclusively on renewable energy. Scotland, UK. May 2012

Ashley Cooper / A crofter and Eigg Electric employee checking the inverters from the various renewable sources Isle of Eigg, Scotland, UK. May 2012

Ashley Cooper / Inverters for renewable generators on the island. Isle of Eigg, Scotland, UK, May 2012

Ashley Cooper / An Eigg crofter and Eigg Electric employee next to their aray of solar PV panels. Isle of Eigg, Scotland, UK. May 2012

Ashley Cooper / The Isle of Eigg off Scotland's west coast, shows the way forward to a renewable future. in 1997 the island was purchased from its fuedal landlord by the Eigg Heritage Trust, a partnership between the...

Ashley Cooper / The Isle of Eigg off Scotland's west coast, shows the way forward to a renewable future. in 1997 the island was purchased from its fuedal landlord by the Eigg Heritage Trust, a partnership between the...

Ashley Cooper / Wind turbines beneath An Sgurr, Isle of Eigg. Isle of Eigg produces all the energy the island needs from renewable energy. Eigg, Scotland, UK, May.

Ashley Cooper / Four wind turbines beneath An Sgurr, Isle of Eigg. Isle of Eigg produces all the energy the island needs from renewable energy. Eigg, Scotland, UK, May.

Ashley Cooper / Empty hydro canal during severe drought. This canal usually takes water to a hydro plant as part of the Tule River hydro system, California, USA, October 2014.

Ashley Cooper / Overspill, standing high and dry at the Hoover Dam on Lake Mead, following a four year long drought. Nevada, USA, September 2014.

Ashley Cooper / Intake towers for the hydro plant on the Hoover Dam, Lake Mead, Nevada, USA. The lake is at a very low level due to the four year long drought. September 2014.

Ashley Cooper / Lake Mead at a very low level due to the four year long drought. Lake Mead, Nevada, USA. September 2014.

Ashley Cooper / The Hoover Dam and Lake Mead hydro electric plant, which is at very low levels following a four year drought. Border of Nevada and Arizona, USA.

Ashley Cooper / The Hoover Dam and Lake Mead hydro electric plant, which is at very low levels following a four year drought. Border of Nevada and Arizona, USA.

Ashley Cooper / The Hoover Dam and Lake Mead hydro electric plant, which is at very low levels following a four year drought. Border of Nevada and Arizona, USA.

Ashley Cooper / A 700 Kw hydro pwer scheme being constructed on the slopes of Ben More on Mull, Scotland, UK.

Ashley Cooper / A 700 Kw hydro power plant being constructed on the slopes of Ben more, Isle of Mull, Scotland, UK. August 2014.

Ashley Cooper / At 152 Mw the Sloy Hydro Power Station is the largest hydro power station in the UK, Loch Lomond, Scotland, UK. August

Ashley Cooper / House with home made small scale hydro turbine to provide electricity, Isle of Eigg, Scotland, UK, May 2012.

Ashley Cooper / Sloy hydro power station on the shores of Loch Lomond, Scotland, UK. May 2012.

Ashley Cooper / Renewable energy sources - wind power, solar power and Sloy hydro power station on the shores of Loch Lomond, Scotland, UK. May 2012.

Ashley Cooper / Hydro electric generator at Loch Lagan, Scotland, UK.

Ashley Cooper / Water turbine on the dam, Lake Emerson on the French Swiss border to generate hydro electric power, Chamonix, Alps, France, September 2007.

Ashley Cooper / Lake Emerson on the French Swiss border to generate hydro electric power, Chamonix, France, September 2007.

Ashley Cooper / Fljotsdalur hydro power station, Karahnjukar a new controversial hydro electricity project, which flooded a large area of wilderness. North East Iceland, September 2010.

Ashley Cooper / Settle hydro electricity scheme, a small scale hydro electricity projet, River Ribble, Yorkshire, England, UK, October.

Ashley Cooper / Rainbow over water flowing out of the Karahnjukar dam and Halslon reservoir, a massive new controversial hydro electricity project in North East Iceland. It was created by damming the Jokuls a Dal riv...

Ashley Cooper / Rainbow over water flowing out of the Karahnjukar dam and Halslon reservoir, a massive new controversial hydro electricity project in North East Iceland. It was created by damming the Jokuls a Dal riv...

Ashley Cooper / Rainbow over water flowing out of the Karahnjukar dam and Halslon reservoir, a massive new controversial hydro electricity project in North East Iceland. It was created by damming the Jokuls a Dal riv...

Ashley Cooper / Man standing on cliff near water flowing out of the Karahnjukar dam and Halslon reservoir, a massive new controversial hydro electricity project in North East Iceland. It was created by damming the Jo...

Ashley Cooper / Water flowing out of the Karahnjukar dam and Halslon reservoir, a massive new controversial hydro electricity project in North East Iceland. It was created by damming the Jokuls a Dal river and floodi...

Ashley Cooper / Water flowing out of the Karahnjukar dam and Halslon reservoir, a massive new controversial hydro electricity project in North East Iceland. It was created by damming the Jokuls a Dal river and floodi...

Ashley Cooper / Water flowing out of the Karahnjukar dam and Halslon reservoir, a massive new controversial hydro electricity project in North East Iceland. It was created by damming the Jokuls a Dal river and floodi...

Ashley Cooper / Water flowing out of the Karahnjukar dam and Halslon reservoir, a massive new controversial hydro electricity project in North East Iceland. It was created by damming the Jokuls a Dal river and floodi...

Ashley Cooper / Water flowing out of the Karahnjukar dam and Halslon reservoir, a massive new controversial hydro electricity project in North East Iceland. It was created by damming the Jokuls a Dal river and floodi...

Ashley Cooper / Turbines in Murray 1 power station. Murray 1 is the second largest power station in the Snowy mountains hydro electricity scheme. New South Wales, Australia, February.

Ashley Cooper / The Iznajar hydro electric power station near Antequera in Andalucia, Spain. June 2011.

Ashley Cooper / The Hoover Dam and Lake Mead hydro electric plant, which is at very low levels following a four year drought

Alan Williams / Pipeline from Llyn Llydaw reservoir on Mount Snowdon to bring water to the hydro-electric power station shown in the River Glaslyn, Valley, below with the summit of Snowdon in the background, Snowdoni...

Tom Gilks / Technicians standing in front of hydro electric power plant, Rwanda, September 2014.

Tom Gilks / Technicians inspecting pipes carrying water to hydro electric power plant, Rwanda, September 2014.

Alan Williams / Pipeline from Llyn Lltdaw Reservoir on Mount Snowdon bringing water to the hydro-electric power station shown in the River Glaslyn Valley below with the summit of Snowdon in the distance, Snowdonia Na...

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

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

Duncan Mcewan / Small Hydro electric power station, Loch Lochy outflow, Inverness-shire, Scotland

Duncan Mcewan / Hydro electric power dam, Glen Finglas, Perthshire, Scotland, UK

Duncan Mcewan / Water pipes and Hydro electric power station Loch Lomond, Scotland, UK

Ashley Cooper / View of construction work for a hydro project on hillside near Encumeada, Madeira. February, 2023.

Ashley Cooper / A small scale hydro plant with water flowing at Colwyth Force, Ambleside, Lake District, UK.

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