It is clear that states and international organizations are the main sources of international law. But international environmental legislation is the effect of efforts by NGOs and government agencies. There have been positive efforts for teams and policies in international environmental legislation in countries such as USA, Germany, Japan, Russia, South Africa, Brazil, China, India and Indonesia. In most cases, environmental protection has been observed in those countries where there is a guaranteed constitutional right to a pollutant-free healthy environment. For example, the law in Costa Rica, Latin America, the Constitution of Chile, Hungary, South Africa, etc., provides for the right to pollution-free environment. Several European Member States have changed their constitutions after the fall of Communism and have included the right to the environment as a righteous right in the constitution.
In federal states, local authorities legislate on environmental issues within their own jurisdiction. The laws and policies initiated by different nations and their local regions have interfered with developing a state-of-the-art transnational environmental policy. In this regard, government and national level administrative and bureaucratic authorities have played an important role in creating environmental activism.
In addition, the US agencies at global level have acted as key players in the environmental protection legislation. For example, the role played by the Food and Agriculture Organization (FAO), the World Health Organization (WHO), the International Maritime Organization (IMO), the World Bank and the International Monetary Fund can not be overlooked as they have helped to take action among states and existing international organizations, including the UN (UNEP), UN Development Program (UNDP) and Commission on Sustainable Development (CSD).
At all levels, local, national and international, however, have had a number of different disagreements regarding decision-making on environmental issues. In particular, at global level, although there is an extensive institutional framework, there is complete absence of unanimity in environmental decisions. It is therefore a challenge to create an order of international environmental management with sustainable development as a priority issue.
It was not until the end of the 1980s that sustainable development began to be included in international texts, first and foremost in political documents and then in binding treaty texts. One of the first treaties to use the term, and especially outside the environment, was the 1990 agreement establishing the European Bank for Reconstruction and Development. Despite the continued political disagreement, the concept of sustainable development has now been introduced within a significant number of binding and non-binding texts both at regional and global level. In 2012, the international community noted at the World Summit on Sustainable Development that progress was most unsatisfactory.
Man is at a certain moment in history, and we must realize that integration of the environment, developmental problems and greater attention to them will lead to the achievement of basic needs and improved living standards for all. a guarantee for an environmentally prosperous future. No nation can achieve this addiction, but together we can in a global partnership for sustainable development.
Therefore, development and conservation of the environment should go hand in hand. Governments of all nations (underdeveloped, developing and developed) should adopt a development policy that ensures pollution control. In that sense, international environmental law faces its greatest challenges in meeting development and environmental needs of present and future generations. The importance of the subject has burgeoned, as is the number and complexity of the legal instruments that try to deal with the threats humanity posed to the planet. Deforestation, marine pollution, climate change, loss of biodiversity and similar problems are now known and still unresolved problems.