Prince William has spoken of the need for people to "work together with optimism and courage" on the environment as he heads for Brazil, hoping to leave behind the problems of his uncle, Andrew Mountbatten Windsor. William will arrive in Rio de Janeiro on Monday to mark the fifth year of his Earthshot Prize awards, arguably the most important week of his year, with him and his team hoping it isn't derailed by any further revelations around his uncle Andrew . In the coming days, he will visit