This lecture explores climate change skepticism, focusing on the rejection of human-induced climate change by a small but influential part of the population. It delves into the different types of climate skepticism, the strategies used to sow doubt, and the tactics employed by skeptics to challenge the scientific consensus. The lecture also discusses the importance of distinguishing between skepticism and denialism, the role of false experts, and the impact of ideological biases on public perception. Additionally, it addresses the tactics of selective evidence, fallacies, and conspiracy theories used by climate change deniers to undermine the overwhelming scientific evidence supporting anthropogenic climate change.