DONSOL, SORSOGON - For Xia Vigor, environmental advocacy has never been just a role—it's something she has grown up with. Last Earth Day, the 16-year-old actress and youngest celebrity ambassador of World Wide Fund for Nature Philippines (WWF-Philippines) marked a new chapter in her environmental advocacy journey as she reflected on her first field visit to one of WWF-Philippines' key conservation sites: the Municipality of Donsol, Sorsogon. Hav…