In 2010, workers painted part of a Peruvian mountain white to regrow its lost glacier; the World Bank selected the idea for a $200,000 grant

In 2010, a strange climate experiment in the Peruvian highlands drew global attention. All it took was a few buckets of whitewash and local workers painting the dark stones on the slopes of Cerro Chalon Sombrero, a mountain in Peru that once had a glacier.

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