Climate change is already present every day and every hour, directly affecting the life and production activities of human, affecting agricultural and water resources, environment and ecology, economy and society. We are happy to announce that we finished the 5th Green Day on 17 Apr 2024 with "Climate Fresk" game. It was really useful so that we can learn about the causes lead to climate change in the first steps. What should we do to reduce the CO2 emissions?