Understanding and accepting climate change is crucial for individuals to adopt environmentally responsible behaviors and support political actions aimed at mitigating greenhouse gas emissions. In this cross-national comparative study, we explore factors associated with both climate change denial and awareness. We analyze data from the European Social Survey (Wave 8) and additional country-level data to identify factors associated with each of these outcomes. We measure awareness as a composite index that aggregates multiple indicators, including beliefs about the existence of climate change, concern, causes, impact, and responsibility. Our findings indicate that climate change denial and awareness do not exist on a single scale. Climate change awareness is strongly influenced by individuals' socio-demographic characteristics, values, and political orientation. Higher levels of awareness are found among those who are more receptive to educational efforts that promote scientific knowledge. In contrast, climate change denial is weakly related to socio-demographic and political factors and is more influenced by individuals' worldviews and detachment from mainstream society. European post-socialist countries demonstrate distinct attitudes towards environmental issues, with lower average climate change awareness and a higher proportion of individuals denying climate change.