Greta Thunberg’s Activism, and Resistance to Mobilize Youth for Climate Change Awareness: The study explores Greta Thunberg’s climate change movement with specific emphasis on mobilizing youth to engage in environmental communication while facing criticism and resistance from influential figures like Donald Trump. The study is important to understand the youth involvement in climate awareness and sustainability efforts. Method: The study objectives are to understand the media portrayal of Greta’s climate change movement with specific emphasis on her unique communication style, impact of health condition (autism), and response to anti-climate change narrative. Qualitative analysis of Reviews, Editorials, and Opinions from news sources (n = 557) between January 2018 and December 2020 were conducted. Findings: The results comprise three prominent themes: (1) Opposition to Greta’s social movement from climate deniers including Donald Trump, (2) Greta’s impact on youth and climate policy at world institutions such as United Nations, and (3) Greta’s candid and open communication style in mobilizing change specifically among youth. Conclusion: The study informs climate policy by introducing a unique perspective and experiences of Greta’s autism and its influence on Generation Z. The results also address the challenges and criticism faced by Greta and the youth worldwide, particularly from prominent climate change doubters, resonating with audiences worldwide and galvanizing global action on climate change.