Grab your passport for this episode of Sky News ClimateCast as hosts Anna Jones and Katerina Vittozzi set foot on a virtual trip around the globe to celebrate Earth Day. They're joined by guests and correspondents in Europe, Asia, Africa and the U.S. to discuss the state of the climate emergency in different corners of the world and ask, what needs to be done to solve the problem? Plus we hear from this week's climate superheroes, including the real Erin Brokovich, in the climate headlines.