Statue of Constantine The Great the first Roman emperor to convert to Christianity, York Minster City of York, North Yorkshire

Emissions from Waternet, a water business that takes sewage from Amsterdam and converts it back into drinking water, Amsterdam, Netherlands, Europe

Oriental hornet (Vespa orientalis) using its jaws to detach two suckersfrom Common Octopus tentacle as it hangs in the sun to tenderise. Skala Sikaminia harbour, Lesbos (Lesvos) Greece. MORE INFO: The yellow parts of this hornet's cuticle absorb sunlight and the pigment xanthopterin converts light into electrical energy.

Orkney Islands Sept 2011 Wave and Tidal Power shoot - The Pelamis Wave Power machine in Orkney - alongside in Lyness - the machine is the P2 . The Pelamis absorbs the energy of ocean waves and converts it into electricity. The machine floats semi-submerged on the surface of the water and is made up of a number of cylindrical sections joined together by hinged joints. As waves pass down the length of the machine these sections flex relative to one another. The motion at each hinged joint is resisted by hydraulic cylinders which pump fluid into high pressure accumulators allowing electrical generation to be smooth and continuous. Control of the resistance applied by the hydraulic cylinders allows generation to be maximised when waves are small, and the machine response to be minimised in storms. All generation systems are sealed and dry inside the machines and power is transmitted to shore using standard subsea cables and equipment.

Orkney Islands Sept 2011 Wave and Tidal Power shoot - The Pelamis Wave Power machine in Orkney - alongside in Lyness - the machine is the P2 . The Pelamis absorbs the energy of ocean waves and converts it into electricity. The machine floats semi-submerged on the surface of the water and is made up of a number of cylindrical sections joined together by hinged joints. As waves pass down the length of the machine these sections flex relative to one another. The motion at each hinged joint is resisted by hydraulic cylinders which pump fluid into high pressure accumulators allowing electrical generation to be smooth and continuous. Control of the resistance applied by the hydraulic cylinders allows generation to be maximised when waves are small, and the machine response to be minimised in storms. All generation systems are sealed and dry inside the machines and power is transmitted to shore using standard subsea cables and equipment.

Orkney Islands Sept 2011 Wave and Tidal Power shoot - The Pelamis Wave Power machine in Orkney - alongside in Lyness - the machine is the P2 . The Pelamis absorbs the energy of ocean waves and converts it into electricity. The machine floats semi-submerged on the surface of the water and is made up of a number of cylindrical sections joined together by hinged joints. As waves pass down the length of the machine these sections flex relative to one another. The motion at each hinged joint is resisted by hydraulic cylinders which pump fluid into high pressure accumulators allowing electrical generation to be smooth and continuous. Control of the resistance applied by the hydraulic cylinders allows generation to be maximised when waves are small, and the machine response to be minimised in storms. All generation systems are sealed and dry inside the machines and power is transmitted to shore using standard subsea cables and equipment.

Orkney Islands Sept 2011 Wave and Tidal Power shoot - The Pelamis Wave Power machine in Orkney - alongside in Lyness - the machine is the P2 . The Pelamis absorbs the energy of ocean waves and converts it into electricity. The machine floats semi-submerged on the surface of the water and is made up of a number of cylindrical sections joined together by hinged joints. As waves pass down the length of the machine these sections flex relative to one another. The motion at each hinged joint is resisted by hydraulic cylinders which pump fluid into high pressure accumulators allowing electrical generation to be smooth and continuous. Control of the resistance applied by the hydraulic cylinders allows generation to be maximised when waves are small, and the machine response to be minimised in storms. All generation systems are sealed and dry inside the machines and power is transmitted to shore using standard subsea cables and equipment.

Capturing methane from an old land fill rubbish dump on Walney Island near Barrow in Furness to convert to green electricity, Cumbria, England, United Kingdom, Europe

Capturing methane from an old land fill rubbish dump on Walney Island near Barrow in Furness to convert to green electricity, Cumbria, England, United Kingdom, Europe

Detail of a photovoltaic system, solar panel, solar cells

Coal-fired power plant, Kiel, Schleswig-Holstein, Germany, Europe

Coal-fired power plant, Kiel, Schleswig-Holstein, Germany, Europe

Historical characters on a wall in Berlin, Germany, Europe

Ostuferhafen harbor with cargo terminals and coal power station at night, Port of Kiel, Schleswig-Holstein, Germany, Europe

Power station, Kiel, Schleswig-Holstein, Germany

Convert Duernstein, Wachau Region, Lower Austria, Austria

Convent Altenburg, Waldviertel Region, Lower Austria, Austria

Convert Durnstein, Wachau Region, Lower Austria, Austra

Convert Durnstein, Wachau Region, Lower Austria, Austra

Stift Ardagger convert, Ardagger, Mostviertel region, Lower Austria, Austria, Europe

Altar of the Convert in Duernstein, Wachau Region, Lower Austria , Austria

Reykjavik, Harpa, the new convert hall and conference center (inaugurated in 2011). The buidling is considered to be one of the new architectural icons of Iceland. europe, northern europe, iceland, February

Reykjavik, Harpa, the new convert hall and conference center (inaugurated in 2011). The buidling is considered to be one of the new architectural icons of Iceland. europe, northern europe, iceland, February

Peruvian Pentecostal convert Calixta Cruz stands with child in her doorway in Angostura. Cruz drew an abusive husband into the church after her conversion. This image is part of a five-part series on the rise of evangelical Protestantism in Latin America.