King penguin (Aptenodytes patagonicus) breeding and nesting colony at Salisbury Plain in the Bay of Isles, South Georgia, Southern Ocean, Polar Regions

Polythene free zone sign showing India's active attempt to reduce plastic pollution, Mahaballipuram, Tamil Nadu, India, Asia

Scuba diver diving on Umbria shipwreck, Sudan, Africa, Red Sea, Wingate Reef

Scuba diver and Car wreck near Blue Belt shipwreck, Sudan, Africa, Red Sea

Scuba diver diving on Umbria shipwreck, Sudan, Africa, Red Sea, Wingate Reef

Scuba diver and Truck wreck in Blue Belt shipwreck, Sudan, Africa, Red Sea

Smokestacks, cooling towers, ThyssenKrupp Steelworks Hamborn, Schwelgern, Duisburg, North Rhine-Westphalia, Germany, Europe

View from Mt. Alsum: the ThyssenKrupp Steelworks Hamborn, Schwelgern, Duisburg, North Rhine-Westphalia, Germany, Europe

View from Mt. Alsum: the ThyssenKrupp Steelworks Hamborn, Schwelgern, Duisburg, North Rhine-Westphalia, Germany, Europe

View from Mt. Alsum: the ThyssenKrupp Steelworks Hamborn, Schwelgern, Duisburg, North Rhine-Westphalia, Germany, Europe

German Kartracing Championships, Kart track in Ampfing, Upper Bavaria, Bavaria, Germany, Europe

German Kartracing Championships, Kart track in Ampfing, Upper Bavaria, Bavaria, Germany, Europe

Glen Canon dam, Lake Powell, near Page, Arizona, USA

A Chevrolet Volt electric car charging outside the General Motors Detroit-Hamtramck Assembly Plant, where the Volt is manufactured, Detroit, Michigan, USA

A diver swims in the underwater national park of Bunaken, Sulawesi, Indonesia.

Chevrolet Volt electric cars charging outside the General Motors Detroit-Hamtramck Assembly Plant, where the Volt is manufactured, Detroit, Michigan, USA

A Chevrolet Volt electric car charging outside the General Motors Detroit-Hamtramck Assembly Plant, where the Volt is manufactured, Detroit, Michigan, USA

Home electronics collection day in Stamford, Connecticut is sponsored by Connecticut Resources Recovery Authority (CRRA). Local residents can bring in old electronics for free collection. The equipment is sent to Amandi who pays about 20 cents a pound to recycle the electronics.

Nakajima B5N2 Kate Torpedo Bomber, Papua New Guinea, New Ireland, Kavieng

Nakajima B5N2 Kate Torpedo Bomber and Scuba diver, Papua New Guinea, New Ireland, Kavieng