At 94 years old, he has dedicated the majority of his life as the voice of environmentalism. He's at it again with both a new documentary on Netflix: "A Life On Our Planet." Likewise, he has a new book out earlier this month by the same name with the subtitle: "My Witness Statement and a Vision for the Future."
Here is the trailer for his Netflix documentary, where he shows the depth of importance humans need to put on our planet--now:
“We can once again become a species in balance with nature and restore the rich, healthy and wonderful world that we inherited... We’ve come this far because we are the smartest creatures that ever lived. But to continue, we require more than intelligence. We require wisdom.” ~ Sir David Attenborough