King Charles III has teamed up with Amazon Prime to make a film about his vision for saving the planet, 16 years after he wrote a book on the subject. The documentary delves into Charles’ concept of “harmony,” the idea that restoring the balance between the human and natural worlds is crucial to combatting global warming and many other major problems facing humanity. The king also confronts his critics, who have lampooned him as a dilettante flitting aimlessly from one cause to another with no rhyme or reason. “Finding Harmony: A King’s Vision,” will be available on Amazon from Feb. 6. The narrator is Kate Winslet.