|Government with the key role as regulator; imposes rules and limits to activities through regulation.
||Market forces as the key role facilitated through regulation - engage price mechanism to motivate behavior toward an environmental objective
||Cooperative relations among government, industry & mediating public interests setting performance expectations through binding agreements.
||Citizen control through the forces of public scrutiny and citizen purchasing power to influence environmental behavior of a target group
||Self imposed voluntary initiatives by regulated parties motivated through a stewardship ethic, social conscience and corporate governance