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Will Gadd is an ice climber, paraglider and a professional kayaker. He lives in Alberta, Canada. He says he's noticed the ice on all the mountain ranges he climbs has been receding - from the Andes, to the Himalayas, the Rockies and the peaks in Africa like Kilimanjaro. And during the forest fires on the west coast of the US, glaciers lost as much as 10 metres in height because of the extreme temperatures and the sooty ash landing on the ice.

Photo: Will Gadd, ice climber Credit: Red Bull/Pondella