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Tourists viewing the cascades, Rio Tulija, Agua Azul National Park, near Palenque, Chiapas, Mexico, North America
Couple embracing on beach, smiling
Bujagali Falls, Victoria Nile, Uganda, East Africa, Africa
Rustic stone bridge over a flowing stream with mossy rocks in a lush, green landscape in the Lake District, Cumbria, England, United Kingdom, Europe
Parabolic discs at the solar energy scientific research centre, Tabernas, Almeria, Andalusia, Spain, Europe
Father and daughter (6-8) playing together by swimming pool
Village of Masango, Cibitoke Province, Burundi, Africa
Desalinisation plant at the solar energy scientific research centre, Tabernas, Almeria, Andalusia, Spain, Europe
Heliostats and central receiver CESA-1 Tower at solar energy scientific research centre, Tabernas, Almeria, Andalusia, Spain, 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
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
Strokkur Geyser, Iceland, Polar Regions
Tuk Tuk racing through Vientiane, Laos, Indochina, Southeast Asia, Asia
Kite surfing at Santa Maria on the island of Sal (Salt), Cape Verde Islands, Atlantic Ocean, Africa
Kite surfing on Red Sea coast of Egypt, North Africa, Africa
Male Thomson's gazelle (Gazella thomsonii) fighting, Masai Mara National Reserve, Kenya, East Africa, Africa
Babbling brook in a mossy wood, Dartmoor National Park, Devon, England, United Kingdom, Europe
Energy efficient CIEMAT building research at Solar energy research establishment near Tabernas, Almeria, Andalusia, Spain, Europe
Energy efficient CIEMAT building research at Solar energy research establishment near Tabernas, Almeria, Andalusia, Spain, Europe
Happy senior man on beach with arms raised
Fireworks bull for children, San Fermin festival, Pamplona, Navarra, Spain, Europe
Itanda Falls, Victoria Nile, Uganda, East Africa, Africa
Aerial View of Wind power station, Tenerife, Spain
Bujagali Falls, Victoria Nile, Uganda, East Africa, Africa
Visitors to an active andesite stratovolcano on White Island, off the East side of North Island, New Zealand, Pacific
Masdar City, a carbon neutral building project relying on solar energy and other renewable power sources, Abu Dhabi, United Arab Emirates, Middle East
Physical Energy statue in winter, Kensington Gardens, London, England, United Kingdom, Europe
Old traditional windmill, Es Mercadal, Minorca (Menorca), Balearic Islands, Spain, Mediterranean, Europe
Electricity pylon against blue sky, Dunhuang, Gansu, China, Asia
Kite surfing on Red Sea coast of Egypt, North Africa, Africa
Wind turbines just outside Mojave, California, United States of America, North America
Windmills along the canal, Kinderdijk, Netherlands
Aerial View of Solar Collectors and Wind power station, Tenerife, Spain
Kite surfing at Santa Maria on the island of Sal (Salt), Cape Verde Islands, Atlantic Ocean, Africa
Visitors watching mud being ejected from the caldera floor of an active andesite stratovolcano on White Island, North Island, New Zealand, Pacific
Mud being ejected from the caldera floor of an active andesite stratovolcano on White Island, North Island, New Zealand, Pacific
Aerial View of Solar Collectors near El Poris, Tenerife, Spain
An active andesite stratovolcano on White Island, off the east side of North Island, New Zealand, Pacific
Small green wave, Strait of Gibraltar, Los Lances Beach, El Estrecho National Park Tarifa, Costa de la Luz, Andalucia, Spain, Europe
Aerial View of Solar Collectors near El Poris, Tenerife, Spain
Old traditional windmills, Campo de Criptana, Castilla la Mancha, Spain, Europe
Young bulls (novillos) in the main square of the village used as the Plaza de Toros, Chinchon, Comunidad de Madrid, Spain, Europe
Whitelee Wind Farm, near Glasgow, Scotland, United Kingdom, Europe
Gas or oil storage tanks, Aberdeen, Scotland, United Kingdom, Europe
The windmills of Oland, UNESCO World Heritage Site, Sweden, Scandinavia, Europe
Tourists watching the stunning Murchison Falls (Kabarega Falls), Murchison Falls National Park, Uganda, East Africa, Africa
Solar farm, Photovoltaic power plant and pylon, Alpes-de-Haute-Provence, France, Europe
Mud being ejected from the caldera floor of an active andesite stratovolcano on White Island, North Island, New Zealand, Pacific
An active andesite stratovolcano on White Island, off the east side of North Island, New Zealand, Pacific
Second Beach, Olympic National Park, UNESCO World Heritage Site, Washington, United States of America, North America
Cumberland Falls on the Cumberland River, it drops 60 feet over the sandstone edge, Kentucky, USA
Turku Energy Station, Turku, Finland, Europe
Woman looks at the stunning Murchison Falls (Kabarega Falls), Murchison Falls National Park, Uganda, East Africa, Africa
Murchison Falls (Kabarega Falls) on the Nile, Murchison Falls National Park, Uganda, East Africa, Africa
Kinderdijk windmills, Holland, Europe
Salto Grande waterfall in the Torres del Paine National Park, Patagonia, Chile, South America
Horsey Mill, Norfolk, England, United Kingdom, Europe
Water turning to steam by subterranean heat, Islote de Hilario, Timanfaya National Park, Lanzarote, Canary Islands, Spain
Volcano eruptions at the Volcano Yasur, Island of Tanna, Vanuatu, South Pacific, Pacific
Iguacu Falls, Argentina, South America
Senior man on beach with arms raised
Coupleon beach, smiling
A view of Thurne Mill, Norfolk Broads, Norfolk, England, United Kingdom, Europe
Murchison Falls (Kabarega Falls) on the Nile, Murchison Falls National Park, Uganda, East Africa, Africa
Statue honoring the oil industry and workers of Argentina, Caleta Olivia, Santa Cruz, Argentina, South America
The caldera floor of an active andesite stratovolcano on White Island, North Island, New Zealand, Pacific
Dancing in the street during Holi celebration in Goverdan, Uttar Pradesh, India, Asia
The windmills of Oland, UNESCO World Heritage Site, Sweden, Scandinavia, Europe
Power Station, Middleburg, Pennsylvania, USA
Model of Beebe windmill, Sag Harbor, The Hamptons, Long Island, New York State, United States of America, North America
Rio Paine waterfalls in the Torres del Paine National Park, Patagonia, Chile, South America
Windmill, El Cotillo, Fuerteventura, Canary islands, Spain, Atlantic, Europe
Aerial View of Solar Collectors near El Poris, Tenerife, Spain
Wind surfing at Santa Maria on the island of Sal (Salt), Cape Verde Islands, Atlantic Ocean, Africa
Puku, Busanga Plains, Kafue National Park, Zambia, Africa
Village of Masango, Cibitoke Province, Burundi, Africa
Windmill in lava vineyards with Faial in distance, Pico, Azores, Portugal, Europe
Waterfall in Whitfield Gill near Askrigg, Wensleydale, North Yorkshire, Yorkshire, England, United Kingdom, Europe
Wind surfing at Santa Maria on the island of Sal (Salt), Cape Verde Islands, Atlantic Ocean, Africa
Thai-Caucasian woman, Phuket, Thailand, Southeast Asia, Asia
A view of Herringfleet Smock Mill at Herringfleet, Suffolk, England, United Kingdom, Europe
Windmills, Campo de Criptana, La Mancha, Spain, Europe
Electric plant near Galati, Romania, Europe
Horses, Hacienda Gauachipelin,near Rincon de la Vieja National Park, Gaunacaste, Costa Rica
Wind surfing at Santa Maria on the island of Sal (Salt), Cape Verde Islands, Atlantic Ocean, Africa
Murchison Falls (Kabarega Falls) on the Nile, Murchison Falls National Park, Uganda, East Africa, Africa
Murchison Falls, Victoria Nile, Uganda, East Africa, Africa
Gardiner Windmill, East Hampton, The Hamptons, Long Island, New York State, United States of America, North America
Visitors at an active andesite stratovolcano on White Island, North Island, New Zealand
Rhine Falls, Schaffhausen, Switzerland, Europe
Rural scene, near Villingen-Schwenningen, Black Forest, Schwarzwald-Baar, Baden-Wurttemberg, Germany, Europe
A view of St. Benet's Mill, Norfolk Broads, Norfolk, England, United Kingdom, Europe
Wind farm, Ebeltoft, Denmark, Scandinavia, Europe
Woman looks at the stunning Murchison Falls (Kabarega Falls), Murchison Falls National Park, Uganda, East Africa, Africa
Murchison Falls (Kabarega Falls) on the Nile, Murchison Falls National Park, Uganda, East Africa, Africa
Kinderdijk windmills, Holland, Europe