The world has lost an incredible thinker and doer. I have lost an amazing friend. A void exists where before it was filled with David's optimism, humour and joy.
Chacaltaya glacier
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Report: Andean Glaciers Melting at "Unprecedented" Rates
Climate change has shrunk Andean glaciers between 30 and 50 percent since the 1970s and could melt many of them away altogether in coming years, according to a study published on Tuesday in the journal Cryosphere.
