Few broadcasters have had as much positive impact as David Attenborough. With over 70 years of filmmaking behind him, Attenborough has become the face (or rather, the voice) of nature documentaries. He continues to lead environmental protection efforts and has created some of his most powerful work in recent years.
The world-renowned naturalist issued a stark warning back in 2018 at a UN Climate Change Conference when he said that "we are facing a man-made disaster of global scale. Our greatest threat in thousands of years. Climate change!"
This was neither the first nor the last time the veteran broadcaster spoke up for the planet. Browse this gallery to learn more about the esteemed natural historian and his words of wisdom and criticism.