: Philippine School Doha establishes the No to Single-Use Plastic advocacy to reduce plastic pollution, a
massive threat to Earth's climate, and instill sustainable practices in the school community. This study focuses on the aftermath
of the PSD's No to Single-Use Plastic advocacy on the students' awareness, actions, progression, and upholding of
environmental sustainability. Method: The utilized phenomenological research design in this qualitative research paper was to
understand the lived experiences of senior high school students of PSD in the No to Single-use Plastic, focusing on its effect on
the PSD's environment and the behavior of PSDians. The data gathered were from twenty-five semi-structured interviews. The
responses were analyzed using an inductive approach in the theme development. Findings: Findings have shown the means of
how the students changed through the advocacy, be it on their behavior or environmental changes towards sustainability.
