Sarah Williams always wanted to become a mum. But the more she learnt about the climate crisis, the more she questioned her decision. In this talk Sarah explains why she's chosen not to have children in order to save the planet, and how she encourages others to think twice about it. She says that she is not anti-child but that overpopulation is something that should concern everyone. Sarah also points out there are more sustainable ways to start a family, like adoption.