UNCEF's newest Goodwill Ambassador, 25-year-old Ugandan activist Vanessa Nakate, has been calling for urgent action to mitigate climate change since 2019, when she organized a protest with her siblings and cousins on the streets of Kampala. Inspired by Greta Thunberg, Nakate continued to protest weekly, becoming a well-known face in the movement of young people striking for climate action around the world.