This lecture introduces the fundamental concepts of social psychology applied to environmental issues, exploring topics such as human social behavior, power dynamics, and the impact of cognitive dissonance on pro-environmental actions. The instructor discusses the levels of social analysis proposed by Doise and presents empirical examples, like Festinger's cognitive dissonance theory and studies on hypocrisy and misattribution. Additionally, the importance of reading and analyzing social psychology literature is highlighted, emphasizing the theoretical frameworks and research methodologies used in the field.