By 2050 there could be 10 billion people living on the planet. For Chris Packham, who’s dedicate his life to protecting the natural world, that may simply be too many people for the Earth to sustain. Travelling around the world in search of answers to difficult and controversial questions, Chris investigates what he believes may be the most important challenge of our time. Can we reduce the impact of our growing human population, and could humans ever choose not to reproduce, for the sake of the planet?

Originally released by BBC Worldwide Learning, 2020. Streaming video file encoded with permission for digital streaming by Infobase on April 30, 2021.