Discourse about environmental change affects public mindfulness, policy choices, and wide-reaching ecological drives. The aim of this research is to analyze the language employed by both political leaders and climate activists in their speeches to understand the differences in their linguistic styles, and messaging strategies. This research seeks to understand how the language used by both leaders and activists affects the way we discuss climate change emphasizing the importance of understanding the power of words to inspire and motivate collective action. We can achieve a comparative analysis of their linguistic styles by comparing their usages of words and phrases. To identify key aspects of their language use based on data that was collected from their speeches delivered at The COP (Conference of Parties) held every year by the United Nations Framework Convention on Climate Change. Two unique corpora were created for analysis, and AntConc functions like the word frequency and concordance tools were utilized to get the results for this study. In the end, a vocabulary analysis settled to expand this investigation to find the rhetorical devices used by each group. According to the study's findings, there are differences between the language styles of political leaders and climate activists. The results show that political leaders use language with logical reasoning to address their audience, while climate activists' speech has a more emotional appeal to draw attention. To advance climate activism agendas, it is essential to understand the distinct language styles of political leaders and climate activists. This understanding can inform effective communication strategies, policy advocacy, and the advancement of climate action agendas.