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A year after releasing _A Plastic Ocean_ , an award-winning documentary about the disastrous effects of disposable plastic on the world’s oceans, Craig Leeson turned his attention to a
different project. Advertisement In 2017, the Australian and long-time Hong Kong resident went filming in the Alps to focus on extreme alpine sports – but when he found out about the work of
a group of French scientists measuring ice deep inside the glaciers, he was drawn back to the mission of shining a light on the perils of climate change. _The Last Glaciers_ , scheduled to
hit the festival circuit this summer, traces the vanishing snowlines in Asia, Europe, South America and Antarctica, in a stark global odyssey that highlights how human activity has wreaked
havoc on the environment. “[The scientists] have been able to ascertain how the atmosphere has changed over the past 800,000 years,” said Leeson, a journalist who has reported for media
outlets including the BBC, CNN and Al Jazeera over a 35-year career. Advertisement “It’s the simplest way to understand the effect that humans are having on the environment. Having been
fairly constant, the atmosphere suddenly changed with the Industrial Revolution, and what we’re seeing now is four times the amount of methane in the atmosphere, and twice the amount of
carbon dioxide,” he said. Leeson and his crew travelled to Nepal last October, trekking north of Kathmandu to Yalla Peak in the Langtang Valley, where the retreating glaciers were all too
plain to see.