This study sought to understand environmental knowledge and attitudes among young people to explain the relationship between environmental education (EE) and reported pro-environmental behaviours (PEB). A mixed-methods design was employed: 88 university students in the UK and Nigeria were surveyed and 6 were subsequently interviewed. The findings indicate that the participants believe humans are abusing the earth and are very concerned about the consequences but do not know enough about environmental problems, especially global warming. Also, those who had more environmental knowledge reported more PEB. Generally, participants want more EE content to be taught in schools and in more engaging ways such as field trips. These findings offer important insights for both theory and practice related to the use of education to develop PEB for a healthier environment.