This study empirically identifies dimensions of behaviour that are distinct in terms of the extent to which people act pro-environmentally. Three dimensions are identified, relating to at-home, transport-related and purchasing behaviour. The correlation between behaviour in each dimension is explored and the characteristics and attitudes associated with the extent to which behaviour is pro-environmental in each dimension are compared. The correlates of pro-environmental behaviour are found to differ between the dimensions. Attitudes towards the environment are more strongly associated with at-home or purchasing behaviours than with transport-related behaviours. The findings have implications for the design of policies intended to influence behaviours with environmental impact and for marketing of pro-environmental behaviours.