<p>This study aims to evaluate climate change risk perception, attitudes, and behaviors among Italian adolescents and their school-teachers, and to identify variables correlated with these perceptions and behaviors. The survey was performed between February and April 2024 in a sample of school-teachers and adolescents in the Campania Region. Among adolescents and school-teachers, 10.3% and 33.3% have correct behaviors for climate change (including turning off the lights at home when they are not in use, closing the refrigerator door while deciding what to get out, and recycling at home), respectively. In the adolescent population, the older, those who have received information from school compared with other sources of information, those who declared a good health status, and those who reported needing additional information about climate change, were very concerned that heat waves will negatively affect future generations. Adolescents who were extremely concerned about climate change, and who believed that climate change will negatively affect future generations, them personally and the Italian population, compared with those not concerned, were significantly more likely to have correct behaviors for climate change. Finally, school-teachers who were extremely concerned that heat waves would negatively affect future generations and who were extremely concerned about climate change were significantly more likely to have correct behaviors regarding climate change. Our results confirm that, although climate change awareness is widespread among adolescents and school-teachers, a critical gap between knowledge and action remains. Therefore, they need now the tools, resources, and institutional support to turn concerns into action.</p>