Prince William has announced the 15-person longlist of Earthshot Prize finalists who are in the running for five £1million prizes later this year. Crowds in New York for the third annual Earthshot Innovation Summit were shown a video of William, filmed in Windsor earlier this month, in which he labelled the group of 15 “true inspirations” as he talked up his – and their – passion for “making a difference to our planet”. In his role as founder and president of the prize, Prince William told attendees: “Today, we celebrate the incredible achievement, unwavering dedication and urgent optimism tha…