As part of the PhD thesis " NGOs activities in the process of forming and implementing the environmental policy of the European Union: experience for Ukraine", the mechanisms that were used during the interaction of a number of NGOs, analytical centers of the EU and Ukraine were studied. The theoretical and practical aspects of forming environmental and energy policies in EU and Ukraine were іnvestigated with NGO participation. The importance of the research topic of the article is determined by the fact that the correct implementation of EU environmental law is strongly dependent on the capacity of NGOs to initiate litigation at the national level. According to scientists, NGOs have two avenues at their disposal for influencing EU policy. Next instruments were identified: open public consultations, Directorate General organises civil society dialogue forums, Ad-hoc interaction with European Commission officials, interaction with MEPs and also NGOs can impact on legislative proceedings through their participation in Intergroups. In contrast to this, it was established that one of the most successful public organizations of Ukraine, which has reached the level of an analytical center with national and international influence, distinguishes the concepts of advocacy and lobbying and, accordingly, uses such public policy tools as: training of decision makers; educating the public about how decisions are made; cancellation of unjustified or incorrect decisions by authorities; discussions and public discussions; interviews, information campaigns to convey the developed positions of NGOs. Also, the article analyzed the analytical products created by the Ukrainian NGO, analytical center, which can be considered effective tools for ensuring transparency in the extractive industry ( nature resourses) and in the energy sector: Nadra monitor and Energy Transparency Index. Based on the results of the research, the author proposed effective tools for advocacy campaigns and institutional development of NGOs, who work in environmental policy including energy and nature resourses field.