As a member of the European Union and of other regional and world organizations responsible for global environmental protection, Romania has adopted internally a set of measures aimed at protecting the environment. In this paper we conducted a general review of the developments of the way of legal defense of the most important environmental values at international and national level, with an emphasis on internal legal rules. We also examined briefly the civil, administrative, and criminal liability of individual and legal entity that violates the current environmental laws. Our research regards the means by which there are protected by the rules of law the main values of the environment, by examination and critical remarks. The results of the research presented at the conclusions, highlight the need to harmonize the national legislation with the European one and the need to amend and supplement the New Criminal Code with a special chapter covering major environmental offenses. The study is useful for those who carry out their activity in this domain, especially professors and students of the law faculty.