Numerous efforts have been made by political leaders worldwide to prevent further climate change and develop sustainable solutions. However, due to conflicting political positions and the complex solutions required, attempts to limit climate change have proven largely ineffective. For these reasons, a new kind of environmental change leader is needed to catalyze significant societal transformation. In recent years, Greta Thunberg has become a major spokesperson for environmental issues, mobilizing people worldwide to act against climate change. Utilizing a theoretical framework based on transformational leadership and moral authority, this article discusses, by means of a systematic literature review, the characteristics of Thunberg’s leadership. Using the PRISMA protocol, data were collected from various national and international media sources. With the assistance of ATLAS-ti.v.9 Scientific Software Development GmbH, Berlin, Germany, qualitative deductive content analysis was performed to analyze the data. In this review, we discuss how Thunberg embodies five characteristics that are typical of moral authority, thereby becoming a transformational leader who influences the possibility of preventing climate change and promotes more sustainable solutions. This article concludes that it is through the characteristics of moral authority that Greta Thunberg has become a global transformational leader for those defending the natural environment