The retreat of the glaciers also affects the electricity supplies of major cities such as la Paz and el Alto in Bolivia which depend on hydro power, says Bolivar Caceres.

玻利瓦·卡塞雷斯说，冰川的退缩还影响到玻利维亚拉巴斯和埃尔·阿尔托这些大城市的电力供应。