The impact of climate change on humanity and nature is increasingly evident. The atmosphere and oceans have warmed, leading to rising sea levels, a sharp drop in Arctic sea ice, floods, heatwaves, and fires. Calls to action are getting stronger. Concerns about climate change have become a full social movement, stimulating climate activism from the bottom up to the world, especially among young people. Campaigns are initiated by governments and international organizations, scientists and scientific institutions, organizations, groups, and people in civil society, public intellectuals and political, religious leaders, people of culture and entertainment. These campaigns generally aim to inform, raise awareness and shape public understanding about the science, problems, and policy of climate change, with the hope that, first of all, people will change their attitudes and behavior, and secondly, will mobilize to put pressure on policymakers for effective climate policies.