Why Robert Downey Jr. Just Invested In Plant-Based Meat Alternatives
Climate activists abound across the globe, but someone looking to put a face to the cause might turn to Swedish wunderkind Greta Thunberg. And we can't dismiss teen-heartthrob-turned-biodiversity-evangelist Leonardo DiCaprio, who was named the United Nations Messenger of Peace for Climate Change in 2014 (via The BBC) and has since helmed a string of documentaries — not to mention a Netflix feature film — about the preventable demise of our planet.