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The glaciers that have long provided water and electricity to this part of Bolivia are melting and disappearing, victims of global warming, most scientists say.
If the water problems are not solved, El Alto, a poor sister city of La Paz, could perhaps be the first large urban casualty of climate change. A World Bank report concluded last year that climate change would eliminate many glaciers in the Andes within 20 years, threatening the existence of nearly 100 million people.
For the nearly 200 nations trying to hammer out an international climate accord in Copenhagen, the question of how to address the needs of dozens of countries like Bolivia is a central focus of the negotiations and a major obstacle to a treaty.
World leaders have long agreed that rich nations must provide money and technology to help developing nations adapt to problems that, to a large extent, have been created by smokestacks and tailpipes far away. But the specifics of that transfer — which countries will pay, how much and for what kinds of projects — remain contentious.
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http://www.nytimes.com/2009/12/14/science/earth/14bolivia.html?_r=2