Venezuela's Vice President Aristobulo Isturiz (R) reacts as he speaks with Venezuela's Central Bank President Nelson Merentes, in front of an image of South American revolutionary hero Simon Bolivar, during a meeting with entrepreneurs and representatives of the productivity sector at Miraflores Palace in Caracas January 20, 2016. REUTERS/Carlos Garcia Rawlins 

A view from the top of Mirror Peak looking down at the Sierra Nevada in the Andean state of Merida July 30, 2008. Global warming is quickly melting glaciers in South America's Andes mountains, threatening to cut available drinking water for millions of residents and cripple hydro-electricity generation projects. The melting of the Andean glaciers from Chile to Venezuela threatens the largest supply of fresh water outside the North and South poles, with the snow-cap of Venezuela's 4979 meter Bolivar Peak possibly disappearing in five years. Picture taken July 30, 2008.
REUTERS/Jorge Silva (VENEZUELA) 

A view of Bolivar Peak at the Sierra Nevada in the Andean state of Merida July 30, 2008. Global warming is quickly melting glaciers in South America's Andes mountains, threatening to cut available drinking water for millions of residents and cripple hydro-electricity generation projects. The melting of the Andean glaciers from Chile to Venezuela threatens the largest supply of fresh water outside the North and South poles, with the snow-cap of Venezuela's 4979 meter Bolivar Peak possibly disappearing in five years. Picture taken July 30, 2008.
REUTERS/Jorge Silva (VENEZUELA) 

A view of Bolivar Peak at the Sierra Nevada in the Andean state of Merida July 30, 2008. Global warming is quickly melting glaciers in South America's Andes mountains, threatening to cut available drinking water for millions of residents and cripple hydro-electricity generation projects. The melting of the Andean glaciers from Chile to Venezuela threatens the largest supply of fresh water outside the North and South poles, with the snow-cap of Venezuela's 4979 meter Bolivar Peak possibly disappearing in five years. Picture taken July 30, 2008.
REUTERS/Jorge Silva (VENEZUELA) 

A tourist walks in front of Peak Bolivar at the Sierra Nevada in the Andean state of Merida July 30, 2008. Global warming is quickly melting glaciers in South America's Andes mountains, threatening to cut available drinking water for millions of residents and cripple hydro-electricity generation projects. The melting of the Andean glaciers from Chile to Venezuela threatens the largest supply of fresh water outside the North and South poles, with the snow-cap of Venezuela's 4979 meter Bolivar Peak possibly disappearing in five years. Picture taken July 30, 2008. REUTERS/Jorge Silva (VENEZUELA) 

Tourist stand in front of Peak Bolivar at the Sierra Nevada in the Andean state of Merida July 30, 2008. Global warming is quickly melting glaciers in South America's Andes mountains, threatening to cut available drinking water for millions of residents and cripple hydro-electricity generation projects. The melting of the Andean glaciers from Chile to Venezuela threatens the largest supply of fresh water outside the North and South poles, with the snow-cap of Venezuela's 4979 meter Bolivar Peak possibly disappearing in five years. Picture taken July 30, 2008. REUTERS/Jorge Silva (VENEZUELA) 

Tourist look at Peak Bolivar from the inside a cable as they arrive at Mirror Peak station in the Andean state of Merida July 30, 2008. Global warming is quickly melting glaciers in South America's Andes mountains, threatening to cut available drinking water for millions of residents and cripple hydro-electricity generation projects. The melting of the Andean glaciers from Chile to Venezuela threatens the largest supply of fresh water outside the North and South poles, with the snow-cap of Venezuela's 4979 meter Bolivar Peak possibly disappearing in five years. Picture taken July 30, 2008. REUTERS/Jorge Silva (VENEZUELA) 

A view of Bolivar Peak at the Sierra Nevada in the andean state of Merida July 30, 2008. Global warming is quickly melting glaciers in South America's Andes mountains, threatening to cut available drinking water for millions of residents and cripple hydro-electricity generation projects. The melting of the Andean glaciers from Chile to Venezuela threatens the largest supply of fresh water outside the North and South poles, with the snow-cap of Venezuela's 4979 meter Bolivar Peak possibly disappearing in five years. Picture taken July 30, 2008.
REUTERS/Jorge Silva (VENEZUELA) 

Tourist stand with the view of Peak Humboldt in front of them at the Sierra Nevada in the andean state of Merida July 30, 2008. Global warming is quickly melting glaciers in South America's Andes mountains, threatening to cut available drinking water for millions of residents and cripple hydro-electricity generation projects. The melting of the Andean glaciers from Chile to Venezuela threatens the largest supply of fresh water outside the North and South poles, with the snow-cap of Venezuela's 4979 meter Bolivar Peak possibly disappearing in five years. Picture taken July 30, 2008. REUTERS/Jorge Silva (VENEZUELA) 

An aerial view of the Gran Sabana, the high plain, in Canaima National Park located in the south-east of Venezuela in Bolivar State close to the borders with Brazil and Guyana, January 13, 2005. In recognition of its extraordinary scenery and geological and biological values, the park was conceded World Heritage Status in 1994. The name of the park, which derives from the novel "Canaima" by Venezuelan author Romulo Gallegos, means "spirit of evil" in the language of the Pemon, local inhabitants of the park. The best-known feature of Canaima National Park are its characteristic flat-topped mountain formations known as tepuis from the local indigenous name. These mountains were popularised in the early part of this century in the novel 'The Lost World' by Sir Arthur Conan Doyle. . REUTERS/Jorge Silva REUTERS JS/AS