This paper explores the relationship between pro-environmental behaviour (PEB) and environmental awareness, knowledge, attitudes, risk perceptions and activism in South Africa. To achieve this goal, the 2010–2012 data from the International Social Survey Program “Environmental III” was analysed by means of descriptive and inferential statistics, including the employment of the structural equation model. Significant differences were found between pro-environmental behaviour and other environmental variables such as environmental concern, awareness, willingness to sacrifice, and others in terms of the educational background, place of living, ethnic identity and provinces where respondents lived. Thus, to increase PEB amongst citizens would require the introduction and support of development programmes that enhance access to more education and environmental awareness across all population groups.