Prince William has spoken passionately about conservation - and how becoming a father for the first time has made him more protective.
In an hour-long documentary, Prince William's Passion: New Father, New Hope, he told of the importance of the "legacy" that he wishes to leave behind for future generations.
William was interviewed at Kensington Palace by documentary film maker Jane Treays, soon after Prince George was born in July.
He appeared moved, not only by footage of conservation workers in Africa but also by a video of his mother Diana, Princess of Wales, seen on an anti-landmine visit to Angola.
He spoke of Diana's "excitement and passion" at the charity work she undertook, and said: "I never realised quite how much of an impact she had".