There are more than 250 multilateral environmental agreements (MEAs) that deal with various environmental issues that are currently in force. About 20 of them contain provisions that could affect trade. They may include, for example, measures prohibiting trade in certain types or products or allowing countries to restrict trade in certain circumstances. An agreement between two nations is called a bilateral agreement on the environment. If the agreement is reached between three or more nations, it is called the Multilateral Agreement on the Environment (MEA). Such agreements, first concluded by the United Nations, deal with issues such as atmospheric policy, freshwater policy, waste and hazardous substances policy, the marine environment, the protection of nature, noise pollution and nuclear safety.  Since the beginning of the negotiations, discussions have focused on the scope of the negotiating mandate (including the definition of specific trade commitments) and the possible outcomes of the negotiations. At the same time, members also began to share their national experiences in negotiating and implementing trade measures nationally under multilateral environmental agreements. The EU has already ratified many international environmental agreements, whether at the global level (multilateral agreements negotiated under the auspices of the United Nations) and at the regional level (for example. B within the framework of the UNITED Nations Economic Commission for Europe or the Council of Europe) and at the sub-regional level (for example. B for the management of seas or cross-border rivers). Global political systems, differences and conflicts are obstacles to the development of environmental protocols.
First, maintaining sovereignty means that no country can be forced to participate, but is simply invited to participate. Therefore, as French says, 「international law has the force of moral evocation, but few real teeth.」  Second, the North-South conflict can block cooperation and provoke conflict. The countries of the world`s South, considered the poor, generally regard the countries of the North, the rich, as the need to take responsibility for environmental degradation and to effect significant changes in their way of life, both of which the North considers reasonable. The South maintains that the North already had the opportunity to develop and to have already been heavily polluted during its industrial development. A detailed table of international environmental agreements, to which the EU is already a party or signatory, has been drawn up. In all these areas, the Union is a strong supporter of international environmental action and cooperation and an active player committed to promoting the concept of sustainable development around the world. How we see the effectiveness of the protocols depends on what we expect from them. With little administrative or real authority, the protocols increase government concern, improve the contractual environment and increase capacity by transferring assets.
But as long as sovereignty is intact, environmental protocols will not have an impact on changes in relation to public or public apathy, guarantee national measures or materialize overnight.