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Kensington Palace also released a film about the prize narrated by Sir David , a British broadcaster and naturalist.

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A post shared by Kensington Palace (@kensingtonroyal) on Dec 31, 2019 at 3:00am PST

Attenborough was by Prince William's side last April when William and his father Prince Charles and brother Prince Harry attended the premiere of \"Our Planet,\" an eight-part documentary series on the impact of climate change.

Attenborough voiced the documentary. William, Harry and Charles' attendance at the premiere was a sign of the importance they place on championing environmental causes. All three royals have been involved in conservation efforts around the world

William, in particular, spearheaded the creation of United for Wildlife, which works to tackle illegal wildlife trade. He currently leads the organization, which is a project of The Royal Foundation, William and Kate's charitable arm.

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A post shared by Kensington Palace (@kensingtonroyal) on Dec 2, 2019 at 1:01am PST

William's Earthshots challenge will be formally launched later this year. The prizes will be awarded in annual awards ceremonies that will take place in different cities around the world each year between 2021 and 2030, according to Kensington Palace.

\"The Prize could be awarded to a wide range of individuals, teams or collaborations – scientists, activists, economists, leaders, governments, banks, businesses, cities, and countries – anyone who is making a substantial development or outstanding contribution to solving these environmental challenges,\" the palace said. \"In addition to a significant financial award, winners will receive large-scale public recognition for their work that will aim to inspire business and government collaboration and scaling.\"

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