There has been enormous attention from EU scholars on environmental policy. Since the 1970s, numerous environmental crises and the emergence of an environmental and social movement have occurred in several European countries, but even after green politics in Europe has calmed down and environmental politics has obtained a “normal” status in the acquis communautaire, this focus has never been This chapter argues that “the study of environmental policy lends itself to contributing to several broader debates on the dynamics in EU decision-making and the nature of the EU political system”. And this chapter is also structured in three parts, "the literature review on 'the emergence of policy and highlight the shift from the integration of national theories', 'the performance of environmental policy', identifying three different perspectives that have been adopted in the literature 'investigating the level of regulation', 'implementation and effectiveness'”. Finally, “it establishes the link between the formulation of environmental policies and the more general process of creating a European policy”. the expansion of the policy, moving from '"niches to center stage'", these are directives adopted to address "hazardous substances, noise and exhaust emissions from motor vehicles". EU has spread the idea of ​​covering all environmental domains (air, water, soil) and major problem areas (waste, hazardous chemicals/substances, nature protection). Organized interests and environmental interest groups are shaping the agenda politics in the “Brussels perspective” and influence the decision-making process, using a mix of strategies ranging from “political pressure and campaigns to providing political advice and information”. The im… middle of the paper… as cohesive as possible (Hey and Brendle, 1994; Webster, 1998). However, it happens that only some environmental groups have benefited from the opportunities available in the EU. This I probably think is an achievement for the EU since it was created with the aim of promoting economic prosperity in Europe through environmental regulation. In conclusion, however, although the EU adopts legally binding directives and regulations, it still lacks the capacity to monitor the practical implementation, as well as the effective sanctioning mechanism. Likewise, in the EU mobilization is stronger, which has promoted cooperation between environmental groups and better distribution of funds which help to strengthen other environmental groups resulting in better implementation of EU environmental policy and, therefore, the foreseen dilemma in EU environmental governance may be unavoidable..