Protecting our planet’s and our own health is the single most important challenge of the next decades. The responsibility to act lies on societal, political and individual levels. Measures to address and adapt to the climate crisis need to be centered around the cause and only potential fighters of climate change – people. To this end, we need to better understand what people think about climate change, which facts they know and which measures they approve of. Through semi-structured interviews, elicit expert assessments from climate science, physics, medicine, meteorology, sociology, psychology, behavioral economics, communications, journalism, NGOs, and government organizations. We ask experts about effective climate change mitigation and adaptation measures, the public’s climate change knowledge, as well as support of mitigation and adaptation measures. In subsequent representative surveys, we match the experts’ assessments with what people know about climate change, which mitigation and adaptation measures they approve of and what kind of support they expect from the government.