Public participation is an essential part of the mechanism of dealing with environmental problems. Both the Aarhus Convention and Union law stipulate that citizens and environmental NGOs should be guaranteed access to justice that includes providing legal standing for environmental NGOs individuals and directly affected by a breach of environmental law. In accordance with the Environmental Liability Directive, persons adversely affected by environmental damage are entitled to ask the competent authorities to take action. However, there are major chellenges to the implementation of environmental legislation, faced by environmental NGOs in obtaining standing to bring legal challenges on environmental issues.