The notion of health, promoted by advocates of Healthy Public Policy, is a broad one. Both equity and sustainability would be regarded as necessary conditions for health. Inequity is both bad per se and is a mechanism through which the health of individuals and communities is damaged. It is therefore appropriate that reduction of health inequalities is advocated as an essential feature of Healthy Public Policy in WHO Health 21 targets number 1 and 2 (WHO Regional Office for Europe, 1999). Sustainability may be defined as ‘meeting the needs of the present without compromising the ability of future generations to meet their own needs’ (World Commission on Environment and Development, 1988). Since Healthy Public Policy is concerned with the health of future, as well as present generations, it must be concerned with sustaining ecosystems, which support the well-being of human populations (Coles et al., 1999).