ABSTRACTABSTRACTIn this essay, age is considered a relevant and significant subject position in which ecological advocates put forth ideologies and cultural constructions of youth to communicate about and for the environment. Young activists employ 'ephebic appeals' to raise awareness of certain issues, display public critical thinking, advocate for society-wide solutions, and empower audiences. The author analyzes the ephebic appeals Greta Thunberg, Autumn Peltier, and Mari Copeny to better understand how age operates rhetorically to justify youth's entrance and involvement in civic and political deliberations, render public judgments, and enable similar reflections and critiques in others. Overall, the essay considers how ephebic appeals expand disciplinary boundaries as they relate to rhetorical agency, protest and social change, and citizenship.KEYWORDS: Agencyenvironmental communicationsocial movementsyouth activism AcknowledgmentsThe author thanks Melanie Loehwig, Matthew Houdek, Alex McVey, Emma Frances Bloomfield, and the peer reviewers for their insightful feedback on this essay.Disclosure StatementNo potential conflict of interest was reported by the author(s).