Despite the overwhelming scientific evidence about the anthropogenic nature of climate change, a vocal minority continues to spread skepticism. This inhibits pro-environmental action and fosters a false perception of social reality, leading people to underestimate the pro-environmental intentions and actions of others required to facilitate rapid and deep decarbonization. Previous efforts to address these beliefs through environmental interventions have yielded inconsistent outcomes. In two studies, we jointly examine the role of first-order climate change beliefs and beliefs about others' behavior (Study 1) as well as second-order climate change beliefs (Study 2) in pro-environmental decision-making in controlled laboratory settings.