An aerial view shows the Grande Dixence dam in Pralong, Sion in this February 3, 2009 file photo. From the Himalayas to the Andes, faster-melting glaciers spell short-term opportunities -- and long-term risks -- for hydroelectric power and the engineering and construction industries it drives. The most widely used form of renewable energy globally, hydro meets more than half Switzerland's energy needs. As summers dry and glaciers that help drive turbines with meltwater recede, that share may eventually fall. Picture taken February 3, 2009.
People walk on the Moiry dam near Grimentz in this August 25, 2009 file photo. From the Himalayas to the Andes, faster-melting glaciers spell short-term opportunities -- and long-term risks -- for hydroelectric power and the engineering and construction industries it drives. The most widely used form of renewable energy globally, hydro meets more than half Switzerland's energy needs. As summers dry and glaciers that help drive turbines with meltwater recede, that share may eventually fall. Picture taken August 25, 2009.
Aletsch glacier, the largest glacier in the Swiss Alps is seen in this August 18, 2007 file photo. From the Himalayas to the Andes, faster-melting glaciers spell short-term opportunities -- and long-term risks -- for hydroelectric power and the engineering and construction industries it drives. The most widely used form of renewable energy globally, hydro meets more than half Switzerland's energy needs. As summers dry and glaciers that help drive turbines with meltwater recede, that share may eventually fall. Picture taken August 18, 2007.
The Grande Dixence dam is pictured with the Lac des Dix in Pralong, near Sion in southern Switzerland in this August 16, 2008 file photo. From the Himalayas to the Andes, faster-melting glaciers spell short-term opportunities -- and long-term risks -- for hydroelectric power and the engineering and construction industries it drives. The most widely used form of renewable energy globally, hydro meets more than half Switzerland's energy needs. As summers dry and glaciers that help drive turbines with meltwater recede, that share may eventually fall. Picture taken August 16, 2008.
The Grande Dixence dam is pictured with the Lac des Dix in Pralong, near Sion in southern Switzerland in this August 16, 2008 file photo. From the Himalayas to the Andes, faster-melting glaciers spell short-term opportunities -- and long-term risks -- for hydroelectric power and the engineering and construction industries it drives. The most widely used form of renewable energy globally, hydro meets more than half Switzerland's energy needs. As summers dry and glaciers that help drive turbines with meltwater recede, that share may eventually fall. Picture taken August 16, 2008.
Andreas Bauder of the Federal Institute of Technology in Zurich (EPFZ) checks his measurement instruments on the Rhone glacier at Furka in this September 9, 2009 file photo. Global warming poses a longer-term threat to the Swiss hydroelectric industry as the glaciers that help drive the turbines with meltwater are forecast to recede rapidly -- a pattern repeated from the Himalayas to the Andes. Picture taken September 9, 2009.
Andreas Bauder of the Federal Institute of Technology in Zurich (EPFZ) checks his measurement instruments on the Rhone glacier at Furka in this September 9, 2009 file photo. From the Himalayas to the Andes, faster-melting glaciers spell short-term opportunities -- and long-term risks -- for hydroelectric power and the engineering and construction industries it drives. The most widely used form of renewable energy globally, hydro meets more than half Switzerland's energy needs. As summers dry and glaciers that help drive turbines with meltwater recede, that share may eventually fall. Picture taken September 9, 2009
Students of the Federal Institute of Technology in Zurich (EPFZ) install measurement instruments on the Rhone glacier at Furka in this September 9, 2009 file photo. From the Himalayas to the Andes, faster-melting glaciers spell short-term opportunities -- and long-term risks -- for hydroelectric power and the engineering and construction industries it drives. The most widely used form of renewable energy globally, hydro meets more than half Switzerland's energy needs. As summers dry and glaciers that help drive turbines with meltwater recede, that share may eventually fall. Picture taken September 9, 2009.
Measurement instruments installed by students of the Federal Institute of Technology in Zurich (EPFZ) are pictured on the Rhone glacier at Furka in this September 9, 2009 file photo. From the Himalayas to the Andes, faster-melting glaciers spell short-term opportunities -- and long-term risks -- for hydroelectric power and the engineering and construction industries it drives. The most widely used form of renewable energy globally, hydro meets more than half Switzerland's energy needs. As summers dry and glaciers that help drive turbines with meltwater recede, that share may eventually fall. Picture taken September 9, 2009
Andreas Bauder of the Federal Institute of Technology in Zurich (EPFZ) checks his measurement instruments on the Rhone glacier at Furka in this September 9, 2009 file photo. From the Himalayas to the Andes, faster-melting glaciers spell short-term opportunities -- and long-term risks -- for hydroelectric power and the engineering and construction industries it drives. The most widely used form of renewable energy globally, hydro meets more than half Switzerland's energy needs. As summers dry and glaciers that help drive turbines with meltwater recede, that share may eventually fall. Picture taken September 9, 2009
Students of the Federal Institute of Technology in Zurich (EPFZ) install measurement instruments on the Rhone glacier at Furka in this September 9, 2009 file photo. From the Himalayas to the Andes, faster-melting glaciers spell short-term opportunities -- and long-term risks -- for hydroelectric power and the engineering and construction industries it drives. The most widely used form of renewable energy globally, hydro meets more than half Switzerland's energy needs. As summers dry and glaciers that help drive turbines with meltwater recede, that share may eventually fall. Picture taken September 9, 2009.
Measurement instruments installed by students of the Federal Institute of Technology in Zurich (EPFZ) are pictured on the Rhone glacier at Furka in this September 9, 2009 file photo. From the Himalayas to the Andes, faster-melting glaciers spell short-term opportunities -- and long-term risks -- for hydroelectric power and the engineering and construction industries it drives. The most widely used form of renewable energy globally, hydro meets more than half Switzerland's energy needs. As summers dry and glaciers that help drive turbines with meltwater recede, that share may eventually fall. Picture taken September 9, 2009
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