A project to restore tropical forests and a global ocean treaty initiative are among the winners of this year's Earthshot Prize.
The winners, named at an awards ceremony in Brazil on Wednesday, will each be given £1m to scale up their projects to repair the climate.
The Prince of Wales, who founded the global environmental award in 2020, said the winners were an inspiration and proof that progress is possible.
Brazilian football legend Cafu, Olympian Rebeca Andrade and former Formula 1 driver Sebastian Vettel were among the presenters, while pop stars Kylie Minogue and Shawn Mendes performed at the ceremony in Rio de Janeiro's Museum of Tomorrow.
UK Prime Minister Sir Keir Starmer, Energy Secretary Ed Miliband and London Mayor Sir Sadiq Khan were also in attendance.
Prince William, who is the president of the prize, told those gathered at the ceremony that he had founded the award with the aim of making this the decade in which we transformed our world for the better.
He emphasized the need for real, lasting changes to protect life on Earth.
The prize draws inspiration from former US President John F Kennedy's Moonshot project, which aimed to get astronauts to the Moon and back safely.
With five specific goals addressed through the various awards, including initiatives to revive oceans and promote waste-free practices, this event marks a pivotal moment as the Prince reflects on the future of the Earthshot Prize, half a decade into its journey.
Nearly 2,500 candidates from 72 countries participated this year, with 15 finalists ultimately showcasing their remarkable proposals.
