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Swiss Alps melting is 'sad for us'

Aletsch Glacier is the largest in the Swiss Alps and has been experiencing a dramatic loss of volume for many years.

Swiss mountain guide, Raoul Volken has been giving tours for over 25 years and charts how he has seen the landscape change over the decades, and even more so over the last few years.

(Photo: Raoul Volken. Credit Raoul Volken)

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