The King gave a stark warning as a new documentary about his environmental work was announced by The King's Foundation and Prime Video. As the palace shared a new photograph of the monarch at his Gloucestershire home, Highgrove House, the monarch, 76, said it is his "fondest hope" that the film will encourage a new audience to embrace his environmental philosophy.

The new image showed Charles, in a light suit and colourful pink patterned tie, resting his hands on his shepherd's crook walking stick, while surrounded by summer greenery in the arboretum at Highgrove.

The documentary, which has the working title Finding Harmony: A King's Vision , will feature Charles' own reflections on his lifelong commitment to promoting a sustainable world and is being billed as an uplifting tale of th

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