Environmental education: effects on knowledge, attitudes and perceptions, and gender differencesSince it emerged in the 1960s, environmental education has been understood as a response to social concern for the environment (Gough, 2014) and as a decisive tool in the promotion of a responsible citizenry committed to the sustainability of environmental policies (Bell, 2016). In the current context, where the management of climate change has become so urgent, there is a clear need for developing a quality environmental education for the general population, especially among children and young people (Rodrigo-Cano et al., 2019). Thus, environmental education has become a privileged means to attain the goals of sustainable development for both social agents and companies (Ilovan et al., 2019; United Nations, 2019).To reach the social impact that it pursues, environmental education has been especially focused on the child and youth population, since it is not strongly influenced at the social and cultural level (Hueso, 2017).According to Freire (2014), the connection between human beings and nature is built throughout the entire lifespan, although childhood is a crucial moment to enhance such link. This model, focused on the central role of school-age children, does not exclude adults from the processes of environmental education; rather, this poses an education from childhood, where young people would be the promoters of behavioural changes in adults (Cuello, 2003). In fact, some studies have already reported evidence of this indirect impact