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People relaxing in Blue Lagoon geothermal spa, Svartsengi Geothermal Power Station in the distance, Grindavik, Reykjanes Peninsula, Iceland, Polar Regions
Hippopotamus (Hippopotamus amphibius) in shallow water among lesser flamingos (Phoeniconaias minor), Lake Nakuru National Park, Kenya, East Africa, Africa
Cape buffalo (African buffalo) (Syncerus caffer) with a cattle egret (Bubulcus ibis) on its back, Lake Nakuru National Park, Kenya, East Africa, Africa
Windmills, Kinderdijk, UNESCO World Heritage Site, Netherlands, Europe
Aerial image of Battersea Power Station, an unused coal-fired power station on the south bank of the River Thames, Battersea, London, England, United Kingdom, Europe
Aerial image of Battersea Power Station, an unused coal-fired power station on the south bank of the River Thames, Battersea, London, England, United Kingdom, Europe
A statue of Julius Cesar in front of Porta Palatina, Turin, Piedmont, Italy, Europe
Boiling mud at an active andesite stratovolcano on White Island, off the east side of North Island, New Zealand, Pacific
Young man holding a Kalashnikov rifle (AK47), Florence, Tuscany, Italy, Europe
Sinemorets, Black Sea Coast, Bulgaria, Europe
Barragem do Alqueva, Rio Guadiana river, Alqueva dam hydroelectric power, Moura, Portugal, Europe
Barragem do Alqueva, Rio Guadiana river, Alqueva dam hydroelectric power, Moura, Portugal, Europe
Peculiar pipework built over the road, Krafla Power Station, is the largest Geothermal power station in Iceland, Polar Regions
Water spout from Strokkur Geysir exploding into the sky on a stormy evening, near Reykjavik, Iceland, Polar Regions
A raging waterfall carves through the rock at Johnston Canyon, Canada, North America
Waterfall details at Falling Foss, North Yorkshire Moors, Yorkshire, England, United Kingdom, Europe
Babbling brook in a mossy wood, Dartmoor National Park, Devon, England, United Kingdom, Europe
Statue of Christ the Redeemer overlooking city and Sugar Loaf mountain, Rio de Janeiro, Brazil, South America
Northern gannet nesting colony on the wave crashed island of Little Skellig Michael, County Kerry, Irish Sea, Republic of Ireland, Europe
Storm force Levante winds blowing the tops of waves, Strait of Gibraltar, Estrecho Natural Park, Los Lanses beach, Tarifa, Costa de la Luz, Andalucia, Spain, Europe
Storm force Levante winds blowing the tops of waves, Strait of Gibraltar, Estrecho Natural Park, Los Lanses beach, Tarifa, Andalucia, Costa de la Luz, Spain, Europe
Passenger trains travelling towards London Victoria station with Battersea Power Station under construction, London, England, United Kingdom, Europe
Gatwick Express passenger train travelling towards London Victoria station with Battersea Power Station under construction, London, England, United Kingdom, Europe
Monument to the Foundation of the Workers Party of Korea, Pyongyang, Democratic People's Republic of Korea (DPRK), North Korea, Asia
City skyline and pollution from coal fired power plants, Pyongyang, Democratic People's Republic of Korea (DPRK), North Korea, Asia
View of Punta Suarez, Espanola Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Waterfall, Glen Artney, near Crieff, Perthshire, Scotland, United Kingdom, Europe
Low Force in Upper Teesdale, County Durham, England
Mount Bromo (Gunung Bromo), an active volcano, erupting at sunrise throwing up ash clouds, East Java, Indonesia, Southeast Asia, Asia
Taf Fechan River flowing through autumn foliage, Brecon Beacons National Park, Powys, Wales, United Kingdom, Europe
Bromo volcano crater on Java, Indonesia, Southeast Asia, Asia
Thornton Force near Ingleton, Yorkshire Dales, North Yorkshire, Yorkshire, England, United Kingdom, Europe
Thornton Force near Ingleton, Yorkshire Dales, North Yorkshire, Yorkshire, England, United Kingdom, Europe
Wairakei Geothermal Power Station, Taupo, North Island, New Zealand, Pacific
Solar panel array in field in countryside providing domestic energy near village of Rogil, Algarve district, Portugal, Europe
Iguacu Falls, Argentina, South America
Bald eagle (Haliaetus leucocephalus) in February, Alaska, USA, North America
Tower of Juche, ideal exhorting the non-dependance on others, Pyongyang, North Korea, Asia
Strokkur Geyser erupting at Geysir, South West area, Iceland, Polar Regions
Narrow chasm leading in the Huka falls on the Waikato River, Taupo, North Island, New Zealand, Pacific
Couple embracing on beach, smiling
Lower Falls, Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
An active andesite stratovolcano on White Island, off the east side of North Island, New Zealand, Pacific
Heliostats at the solar energy scientific research centre, Tabernas, Almeria, Andalusia, Spain, Europe
Foz de Iguazu (Iguacu Falls), the largest waterfalls in the world, Iguacu National Park, UNESCO World Heritage Site, Brazil, South America
Heliostats reflect sunrays to receiver tower, solar energy scientific research centre, AORA Tulip System, Tabernas, Almeria, Andalusia, Spain, Europe
Barragem do Alqueva, Rio Guadiana river, Alqueva dam hydroelectric power, Moura, Portugal, Europe
Geothermal power station on the Rekjanes Peninsula, near Keflavik, Iceland, Polar Regions
Power House building, Guinness Brewery, architect F R M Woodhouse, 1948, St. James' Gate, Dublin, Republic of Ireland, Europe
View of massive wind turbines in a wind farm near Smola Island, Norway, Scandinavia, Europe
The American Falls at the Niagara Falls, New York State, USA
Aerial View of Wind power station, Tenerife, Spain
Tourists viewing the cascades, Rio Tulija, Agua Azul National Park, near Palenque, Chiapas, Mexico, North America
Grandparents and grandchildren (6-8) on beach
Lion (Panthera leo), Kgalagadi Transfrontier Park, Northern Cape, South Africa, Africa
Lion (Panthera leo) carrying a blue wildebeest (brindled gnu) (Connochaetes taurinus) carcass, Masai Mara National Reserve, Kenya, East Africa, Africa
Masdar City, a carbon neutral building project relying on solar energy and other renewable power sources, Abu Dhabi, United Arab Emirates, Middle East
Bujagali Falls, Victoria Nile, Uganda, East Africa, Africa
A Bai girl carrying buckets of water in front of a water wheel in Lijiang Old Town, UNESCO World Heritage Site, Yunnan Province, China, Asia
Boys playing football, Village of Masango, Cibitoke Province, Burundi, Africa
Foz de Iguazu (Iguacu Falls), the largest waterfalls in the world, Iguacu National Park, UNESCO World Heritage Site, Brazil, South America
Old Power Plant, Vittoria, Ragusa, Sicily, Italy
Heliostats reflecting sun rays, solar energy scientific research centre, AORA Tulip System, Tabernas, Almeria, Andalusia, Spain, Europe
Turbines at Parque Eolico de Lanzarote wind farm, Lanzarote, Canary Islands, Spain, Atlantic, Europe
Barragem do Alqueva dam, part of the multipurpose water management project on the Rio Guadiana river, hydro-electricity generation electricity power lines, Moura, Portugal, Europe
Geothermal power station on the Rekjanes Peninsula, near Keflavik, Iceland, Polar Regions
Rocky stream at Tavy Cleave, Dartmoor, Devon, England, United Kingdom, Europe
Volcano eruptions at the Volcano Yasur, Island of Tanna, Vanuatu, South Pacific, Pacific
Beautiful Mele-Maat cascades in Port Vila, Island of Efate, Vanuatu, South Pacific, Pacific
Castell de Bellver, a 14th century castle, Palma de Mallorca, Mallorca (Majorca), Balearic Islands, Spain, Mediterranean, Europe
Father and daughter (6-8) playing together by swimming pool
Couple embracing on beach, smiling
Praca Dom Pedro IV (Rossio Square), Lisbon, Portugal, Europe
Village of Masango, Cibitoke Province, Burundi, Africa
Narrow chasm leading in the Huka falls on the Waikato River, Taupo, North Island, New Zealand, Pacific
Statue of Liberty, Liberty Island, New York City, New York, United States of America, North America
Desalinisation plant at the solar energy scientific research centre, Tabernas, Almeria, Andalusia, Spain, Europe
Osprey (Pandion haliaetus) leaving a fishing pool with wings arched creating the power to lift the freshly caught fish, Pirkanmaa, Finland, Scandinavia, Europe
Array of solar panels on a bright sunny day, Sierra Alhamilla, near Nijar, Almeria, Andalusia, Spain, Europe
Breaching humpback whale (Megaptera novaeangliae), Ecuador, South America
Nuclear Power Plant in Antwerp, Belgium, Europe
Horseshoe Falls, Niagara Falls, Niagara, Ontario, Canada, North America
Statue of Liberty, Liberty Island, New York City, New York, United States of America, North America
Tourists watching Old Faithful Geyser, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Aerial view, Windsor Castle, Windsor, Berkshire, England, United Kingdom, Europe
Iguacu Falls, Parana State, Brazil, South America
Aerial View of Solar Collectors and Wind power station, Tenerife, Spain
Masdar City, a carbon neutral building project relying on solar energy and other renewable power sources. Abu Dhabi, United Arab Emirates, Middle East
Solar farm, detail of photovoltaic power plant, Alpes-de-Haute-Provence, France, Europe
Foz de Iguazu (Iguacu Falls), the largest waterfalls in the world, Iguacu National Park, UNESCO World Heritage Site, Brazil, South America
Strokkur Geyser, Iceland, Polar Regions
Tuk Tuk racing through Vientiane, Laos, Indochina, Southeast Asia, Asia
Statue of Liberty, Liberty Island, New York City, New York, United States of America, North America
Male Thomson's gazelle (Gazella thomsonii) fighting, Masai Mara National Reserve, Kenya, East Africa, Africa
Foz de Iguazu (Iguacu Falls), the largest waterfalls in the world, Iguacu National Park, UNESCO World Heritage Site, Brazil, South America
Arava Power solar panel field, Kibbutz Ketura, Southern Arava Valley, Israel, Middle East
Babbling brook in a mossy wood, Dartmoor National Park, Devon, England, United Kingdom, Europe
Upper Falls, Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Fireworks bull for children, San Fermin festival, Pamplona, Navarra, Spain, Europe
Long exposure of passenger train travelling towards Battersea Power Station, London, England, United Kingdom, Europe