Indigenous communities have looked after their ancestral forests for millennia, cultivating immense amounts of knowledge on how to protect, nourish and heal these vital environments. Today, 470 million Indigenous people care for and manage 80 percent of the world's biodiversity -- yet their legal rights to these lands are inexplicit and subject to exploitation by illegal loggers, miners and companies. Human rights lawyer Nonette Royo describes how her team at the Tenure Facility, an organization that provides legal assistance to Indigenous people by taking their land rights battles to court, will help these communities secure and defend 50 million hectares of forests over the next five years. (This ambitious plan is a part of the Audacious Project, TED's initiative to inspire and fund global change.)