In September 2019, Swedish activist Greta Thunberg captivated the world with her powerful and impassioned address to world leaders at the United Nations Climate Action Summit. This in-depth analysis aims to delve into the rhetorical strategies that Thunberg skillfully employs in her speech and thoroughly evaluate their effectiveness in convincing her audience. It will further explore Thunberg's adept use of ethos, pathos, logos, and Kairos and how she expertly utilizes emotion to bolster her argument—looking into a thorough examination of Thunberg's credibility as both a speaker and a source, carefully evaluating any potential biases or fallacies in her argument. Finally, we will extensively discuss the effectiveness of her rhetoric and argument