Emotions can be important drivers of human decision making. This study contributes to the growing body of literature examining the role of experienced emotions in economic decision-making in the context of climate change. Using short video treatments in an experimental laboratory setting with 301 students, we induce climate-related hope, fear, and guilt, and investigate their impact on one key dimension of climate engagement behavior: donations to environmental NGOs engaged in CO2 emission reduction. We find that inducing climate-related guilt affects donation behavior at the extensive and at the intensive margin, while hope reduces donation amounts. Measuring emotions before and after the treatment, directly after climate engagement and four weeks after our experiment, we are able to follow the development of emotional states over time and, thus, investigate how emotions evolve for individuals who provided climate change mitigation efforts vs. individuals who did not provide any efforts.