An analysis of recent environmental legislation in Belgium (Flanders) shows that only small part of it originated from direct pressure by the environmental movement. Although in recent years environmental groups were admitted to a number of advisory committees, this did not really made them a more powerful political force. Four reasons can be given for this relative weakness: 1) like all new social movements, the movement bas a weak organisational structure; 2) it's focus is on local disturbances to the environment; 3) it's disruptive potential is limited, especially on the national level; 4) it has little format access to the decision making process. The main consequence of it's activities is an innovation of political culture. The movement is succesful in defining and constructing environmental problems, and forcing them on the public and political agenda, but it lacks the power to steer the decision making process on the issues it has created.