The Nant Ffrancon valley in spring backed by Foel Goch and the Glyderau mountains, Snowdonia National Park (Eryri), North Wales, United Kingdom, Europe

Macaroni penguins (Eudyptes chrysolophus) scrambling up steep cliffs at Hercules Bay on South Georgia Island, Polar Regions

A small group of reindeer (Rangifer tarandus) near the abandoned whaling station in Stromness Bay, South Georgia, Polar Regions

Southern elephant seal (Mirounga leonina) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions

Two ducks and one egg, Eu, Seine-Maritime department, Haute-Normandy region, northern France, Europe

Aerial view taken by drone of iceberg in Jokusarloon Glacier Lagoon during a summer day, Iceland, Polar Regions

Aerial view taken by drone of Skyggnisvtn lake in Landmannalaugar area, during a summer day, Iceland, Polar Regions

An Atlantic Puffin (Fratercula arctica), in Borgarfjaroarhofn, Iceland, Polar Regions

Floating icebergs, Ilulissat Icefjord, UNESCO World Heritage Site, Western Greenland, Denmark, Polar Regions

Floating icebergs, Ilulissat Icefjord, UNESCO World Heritage Site, Western Greenland, Denmark, Polar Regions

Mountainous fjord, Kulusuk, Greenland, Denmark, Polar Regions

Mountainous fjord, Kulusuk, Greenland, Denmark, Polar Regions

Kulusuk, Greenland, Denmark, Polar Regions

Mountaimous fjord, Kulusuk, Greenland, Denmark, Polar Regions

Aerial of the mountainous coastline around Kulusuk, Greenland, Polar Regions

Southern giant petrel (Macronectes giganteus) in flight against the sun near South Georgia, Southern Ocean, Polar Regions

Adult grey-headed albatross (Thalassarche chrysostoma) (grey-headed mollymawk), Elsehul, South Georgia, Polar Regions

City at the foot of a mountain at the inland sea, Miyajima, Hiroshima Prefecture, Honshu, Japan, Asia

El Misti and Chachani volcanoes seen from salt flats of Salinas y Aguada Blanca National Reserve, Arequipa Region, Peru, South America

Reflections of icebergs in the calm water photographed from an expedition ship operating in Antarctica, Southern Ocean, Polar Regions

Antarctic shag (Phalacrocorax (atriceps) bransfieldensis) at nesting site amongst gentoo penguins at Jougla Point, Antarctica, Polar Regions

Sweeper at Prambanan Temple Compounds, UNESCO World Heritage Site, region of Yogyakarta, Java island, Indonesia, Southeast Asia, Asia

Aerial view taken by drone of iceberg in Jokusarloon Glacier Lagoon during a summer day, Iceland, Polar Regions

Floating icebergs in the Nuuk Icefjord, Western Greenland, Denmark, Polar Regions

Trail at archaeological site of Pisaq (Pisac), UNESCO World Heritage Site, Pisaq, Sacred Valley, Urubamba Province, Cusco (Cuzco) Region, Peru, South America

Sunrise on king penguins (Aptenodytes patagonicus) at nesting and breeding colony at Salisbury Plain, South Georgia, Polar Regions

Aerial of a little ship floating between the ice below the Eqi glacier, Western Greenland, Denmark, Polar Regions

Aerial of the Ilulissat Icefjord, UNESCO World Heritage Site, Western Greenland, Denmark, Polar Regions

Aerial of Nuuk, capital of Greenland, Denmark, Polar Regions

Forest rangers on patrol, Pan de Azucar, Vinales National Park, UNESCO World Heritage Site, Pinar del Rio, Cuba, West Indies, Caribbean, Central America

Herd of alpacas grazing against mountains, Salinas y Aguada Blanca National Reserve, Arequipa Province, Arequipa Region, Peru, South America

Southern elephant seal (Mirounga leonina) bull issuing a vocalization challenge at Gold Harbour on South Georgia, Polar Regions

Stream in the Andes and herd of alpacas, near Rainbow Mountain, Pitumarca District, Cusco (Cuzco) Region, Peru, South America

Valle Rojo (Red Valley) at sunrise, near Rainbow Mountain, Pitumarca District, Cusco (Cuzco) Region, Peru, South America

Palm trees on Yacumama Lake, Puerto Maldonado, Tambopata Province, Madre de Dios, Peru, South America

Adult king penguins (Aptenodytes patagonicus) returning from sea to the nesting colony at Salisbury Plain, South Georgia, Polar Regions

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Gran Cenote de Tulum in Yucatan Peninsula, Quintana Roo, Mexico. There are thousands of cenotes dotted all over Mexico���s Yucatan Peninsula, and their existence is as much a defining characteristic of the region as is the distinct geological feature from which they result. Once revered by the ancient Mayans as sacred wells, they are now magnets for tourists, adventurers, and explorers alike.

Palms and old pier in Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Bucket-wheel excavator, lignite mining, Garzweiler, near Jüchen, Erkelenz, North Rhine-Westphalia, Germany, Europe

Bucket-wheel excavators, Garzweiler lignite mining, near Jüchen, Erkelenz, North Rhine-Westphalia, Germany, Europe

Aerial view, Westfalen RWE power plant, RWE Power coal-fired power station, next to the former THTR nuclear power plant, Hamm, Ruhr district, North Rhine-Westphalia, Germany, Europe

Coking plant, steel plant by the Rhine, furnaces Schwelgern 1 and 2, cooling tower of coal power plant Duisburg Walsum behind, ThyssenKrupp Steel Europe, Hamborn, Duisburg, North Rhine-Westphalia, Germany, Europe

Kraftwerk Voerde coal power plant on the Rhine, emissions, smoke, smokestacks, cooling tower, Voerde, Ruhr district, North Rhine-Westphalia, Germany, Europe

Kraftwerk Voerde coal power plant on the Rhine, emissions, smoke, smokestacks, cooling tower, Voerde, Ruhr district, North Rhine-Westphalia, Germany, Europe

Uprooted trees have damaged a house, storm damage from 9 June 2014, Mülheim an der Ruhr, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Hamilton Island, Whitsunday Islands, Great Barrier Reef, Queensland

Hamilton Island, Whitsunday Islands, Great Barrier Reef, Queensland

Hiking along the Aletsch Glacier, Konkordia Platz, UNESCO world heritage Jungfrau - Aletsch - Bietschhorn region, Valais, Switzerland

View toward Konkordia Platz, Aletsch glacier, UNESCO world heritage Jungfrau - Aletsch - Bietschhorn region, Valais, Switzerland

View from Mount Eggishorn to the Aletsch Glacier, UNESCO world heritage Jungfrau - Aletsch - Bietschhorn region, Valais, Switzerland

Emschermündung, River Emscher and Rhine, coal power plant, Dinslaken, Ruhr district, North Rhine-Westphalia, Germany, Europe

Coal power plant Scholven, E.ON Kraftwerke, cooling towers, chimneys, smoke, Gelsenkirchen, Ruhr district, North Rhine-Westphalia, Germany, Europe

Coal power plant Scholven, E.ON Kraftwerke, cooling towers, chimneys, smoke, Gelsenkirchen, Ruhr district, North Rhine-Westphalia, Germany, Europe

Aerial view, Kraftwerk Westfalen power plant, RWE Power, coal power plant, former nuclear power plant THTR Hamm-Uentrop, Welver, Ruhr district, North Rhine-Westphalia, Germany, Europe

People walking across Hoheward waste dump, in front of chimneys of the AGR incinerating plant, Herten, North Rhine-Westphalia, Germany, Europe

Aerial view, coal power plants on the Rhine, Lower Rhine, floodplains, Rhine bend at Beeckerwerth, Duisburg, Ruhr district, North Rhine-Westphalia, Germany, Europe

Aerial view, wind turbines on Rosskopf mountain, Freiburg im Breisgau, Baden-Wuerttemberg, Germany, Europe

Coal plant Kraftwerk Duisburg-Walsum in front of the Rhine, backlit, cloud of smoke, emissions, Ruhr district, Duisburg, North Rhine-Westphalia, Germany, Europe

Westfalen coal-fired power plant of RWE Power in the sunrise, Hamm, Ruhr district, North Rhine-Westphalia, Germany, Europe

Peat harvest, Tullamore, County Offaly, Leinster province, Republic of Ireland, Europe

Aerial view, low clouds, Gersteinwerk of RWE Power, coal-fired power plant, temperature inversion, Bockum-Hövel, Hamm, Ruhr Area, North Rhine-Westphalia, Germany, Europe

STEAG Evonik Walsum coal-fired power plant, Duisburg, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Landrover on a dirt road in Tarangire national park, Tanzania

Dead spruce (Picea), caused by bark beetles (Scolytinae) on Mt Belchen, 1414m, Breisgau region, Upper Black Forest region, Baden-Wuerttemberg, Germany, Europe

E.ON Scholven Power Station, Gelsenkirchen, Ruhr district, North Rhine-Westphalia, Germany, Europe

Peat harvest, Tullamore, County Offaly, Leinster province, Republic of Ireland, Europe

Landrover on a dirt road in Tarangire national park, Tanzania

Aerial view, construction site, bulk ships, unloading of coal, ThyssenKrupp Steel, port Walsum, Duisburg, Ruhrgebiet region, North Rhine-Westphalia, Germany, Europe

Dry Isar riverbed, Sylvenstein, Upper Bavaria, Germany, Europe

Industrial chimneys, exhausts, Germany, Europe

Industrial chimneys, exhausts, Germany, Europe

Wetlands at Newport Bay Ecological Reserve Newport Beach, United States of America