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An active andesite stratovolcano on White Island, off the east side of North Island, New Zealand, Pacific

Boiling mud at an active andesite stratovolcano on White Island, off the east side of North Island, New Zealand, Pacific

Water turning to steam by subterranean heat, Islote de Hilario, Timanfaya National Park, Lanzarote, Canary Islands, Spain

Steam emitted from the New York Steam System, dating back to 1882 providing steam to heat, cool or disinfect around 1,700 buildings, New York, United States of America, North America

The new elevator of the thermal baths using a wastewater-based system, Saint Gervais, Haute-Savoie, France

Vertical aerial shot taken by drone of the volcano Sundhnukasgigar, during the eruption of summer 2024, Iceland, Polar Regions

Castle Geyser, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Castle and Sawmill Geysers in eruption in Old Faithful Geyser Basin in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

The Kamal factory in Bangalore, Karnataka, India that manufactures solar thermal panels for heating water.

The Kamal factory in Bangalore, Karnataka, India that manufactures solar thermal panels for heating water.

Solar thermal panels on a house on the Isle of Eigg which is 98% powered by renewable energy, west coast, Scotland, United Kingdom, Europe

Solar thermal and solar PV panels on the roof of the Crystal building which is the first building in the world to be awarded an outstanding BREEAM (BRE Environmental Assessment Method) rating and a LEED (Leadership in Energy and Environmental Design) platinum rating. London, UK.

Solar thermal and solar PV panels on the roof of the Crystal building which is the first building in the world to be awarded an outstanding BREEAM (BRE Environmental Assessment Method) rating and a LEED (Leadership in Energy and Environmental Design) platinum rating. London, UK.

Solar thermal and solar PV panels on the roof of the Crystal building which is the first building in the world to be awarded an outstanding BREEAM (BRE Environmental Assessment Method) rating and a LEED (Leadership in Energy and Environmental Design) platinum rating. London, UK.

The Kamal factory in Bangalore, Karnataka, India that manufactures solar thermal panels for heating water.

Solar photo voltaic panels and solar thermal panels providing electricity and hot water for a 16th century farm house on Bodmin Moor, Cornwall, England, United Kingdom, Europe

Solar thermal panels for heating water with solar photo voltaic panels on the rooftops of a tea house in the Himalayan foothills, Nepal, Asia

Solar thermal panels for heating water with solar photo voltaic panels on the rooftops of a tea house in the Himalayan foothills, Nepal, Asia

Solar thermal panels on a house on the Isle of Eigg which is 98% powered by renewable energy, west coast, Scotland, United Kingdom, Europe

Capturing geothermal steam from boreholes to power the Svartsengi geothermal power station in Keflavik near Reykjavik in Iceland, Polar Regions

Close up views of glacial ice and ash after the 1969 eruption on Deception Island in Antarctica. Here thermal energy sends steam up in the seawater surrounding the recent ash flow.

Strokkur geyser erupting, in the Geysir hot springs area, Haukadalur geothermal area, Southwest Iceland

Strokkur geyser erupting, in the Geysir hot springs area, Haukadalur geothermal area, Southwest Iceland

Strokkur Geyser, Haukadalur Valley, Golden Circle, Su√∞urland, Sudurland, Southern Iceland, Iceland, Europe

Hot spring, sinter terraces, Hveravellir high-temperature or geothermal region, Highlands, Iceland, Europe

Solfataras, fumaroles, mud pools, sulfur and other minerals, viewing platform, steam, Hveraroend geothermal area, N√°mafjall mountains, M√Ωvatn area, Nor√∞urland eystra, the north-east region, Iceland, Europe

Blue water pool, Bl√°hver hot spring, Hveravellir high-temperature or geothermal region, Highlands, Iceland, Europe

Hiker on a trail, hot springs and snow-capped Rhyolite Mountains, Hveradallir high temperature region, Kerlingarfjoell, highlands, Iceland, Europe

Solfataras, fumaroles, mud pools, sulfur and other minerals, steam, Hveraroend geothermal area, N√°mafjall mountains, M√Ωvatn area, Nor√∞urland eystra, the north-east region, Iceland, Europe

Blue water pool, Bl√°hver hot spring, Hveravellir high-temperature or geothermal region, Highlands, Iceland, Europe

Steaming creek, hot springs and Rhyolite Mountains, Hveradallir high temperature area, Kerlingarfjoell, highlands, Iceland, Europe

Solfataras, fumaroles, mud pools, sulfur and other minerals, steam, Hveraroend geothermal area, N√°mafjall mountains, M√Ωvatn area, Nor√∞urland eystra, the north-east region, Iceland, Europe

Tourists watching steam and a water spout, Strokkur geyser, backlit, Haukadalur valley, Golden Circle, Su√∞urland, Sudurland, southern Iceland, Iceland, Europe

Tourists watching a steam and water column, Stokkur geyser against the light, Haukadalur Valley, Golden Circle, Su√∞urland, South Iceland, Iceland, Europe

Hiker on a trail, hot springs and snow-capped Rhyolite Mountains, Hveradallir high temperature region, Kerlingarfjoell, highlands, Iceland, Europe

People watching Strokkur Geyser errupting, fountain, hot springs, Haukadalur, Golden Circle, Iceland, Scandinavia, Northern Europe, Europe

Demonstration of the geothermal energy in the National park Timanfaya, Lanzarote, Canary Islands, Spain

Effluent area of the Canary Spring Terrace, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, Mammoth Hot Springs Terraces in Yellowstone National Park, Idaho, Montana, Wyoming, America

Mound and Jupiter Spring Terrace, Main Terrace, limestone sinter terraces, geysers, hot springs, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, United States of America, USA

Palette Spring Street, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, America

Sunset Lake, geyser, drainage area with a boardwalk, coloured thermophilic bacteria, microorganisms, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

Orange Mound Road, Upper Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, America

Canary Spring Terrace, limestone sinter terraces, geysers, hot springs, in front of Mount Everts, Mammoth Hot Springs Terraces in Yellowstone National Park, Idaho, Montana, Wyoming, America

Minerva Spring Terrace, Lower Terraces, limestone sinter terraces, geysers, hot springs, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, United States of America, USA

Geothermal power plant, Nesjavellir power plant, Hengill region, Iceland, Scandinavia, Northern Europe, Europe

Futuristic house, geothermal power plant, Nesjavellir power plant, Hverageri, Hengill region, Iceland, Scandinavia, Northern Europe, Europe

Steppe, open plain, Polloquere springs, thermal baths, Salar de Surire, Salt Lake, Reserva Nacional de las Vicunas, Lauca National Park, Altiplano, Norte Grande, Northern Chile, Chile, South America

Geothermal power plant, Nesjavellir power plant, Hengill region, Iceland, Scandinavia, Northern Europe, Europe

Solar furnace, le Grand Four Solaire d'Odeillo, 1000 kW thermal power station, Font-Romeu-Odeillo-Via, Pyrenees-Orientales, Northern Catalonia, France, Europe, PublicGround

Geothermal region of Gunnuhver in southern Iceland with steam from the countless holes and fractures in the earth's crust, Iceland, Europe

Blahver, blue spring, the most beautiful blue water pool in Hveravellir in the Highlands, in front of Oeskjuholt, a steaming calc-sinter mound which looks like a mini volcano, below a rainbow, Hveravellir, Iceland, Europe

Steam from the countless holes and fractures in the earth's crust, the Solfatarten, behind it a geothermal power station and a factory for salt extraction, which is operated with geothermal energy, geothermal region of Gunnuhver, southern Iceland, Iceland

Solar furnace, le Grand Four Solaire d'Odeillo, 1000 kW thermal power station, Font-Romeu-Odeillo-Via, Pyrenees-Orientales, Northern Catalonia, France, Europe, PublicGround

Blahver, blue spring, the most beautiful blue water pool in Hveravellir in the Highlands, in front of Oeskjuholt, a steaming calc-sinter mound which looks like a mini volcano, below a rainbow, Hveravellir, Iceland, Europe

The geothermal Nesjavellir power station delivers energy via long pipelines and power-cables as far as Reykjavik, Iceland, Europe

Champagne Pool, hot spring, Waiotapu Geothermal Wonderland, Rotorua, North Island, New Zealand, Oceania

Champagne Pool, hot spring, Waiotapu Geothermal Wonderland, Rotorua, North Island, New Zealand, Oceania

Detailed view of the discoloration caused by bacteria and algae on a geyser, Geyser Hill, Old Faithful Area, Yellowstone National Park, Wyoming, USA, North America

Steaming hot springs, geothermal area Hverarönd, also Hverir or Namaskard, Northern Iceland, Iceland, Europe

Thermal springs of Benjë, River Lengarica, Lengaricë, near Përmet, National Park Hotova-Dangell, behind the Nemërçka Mountains, Qar Gjirokastra, Gjirokastër, Albania, Europe