Mongabay: Legendary filmmaker, broadcaster, and conservationist, David Attenborough has become a patron of the group Optimum Population Trust (OPT). The organization’s goal is to use education and policy to lower the world’s population. “I’ve seen wildlife under mounting human pressure all over the world and it’s not just from human economy or technology – behind every threat is the frightening explosion in human numbers,” Attenborough said according to a press release from Optimum Population …