Under U.S. law, a president may, in certain circumstances, authorize U.S. participation in an international agreement without submitting it to Congress. Whether the new agreement implements a pre-agreement, such as the UNFCCC, ratified by the Council and Senate approval, and whether it complies with existing U.S. legislation and can be implemented on that basis. Since the agreement does not contain binding emission targets or binding financial commitments beyond those of the UNFCCC and can be implemented on the basis of existing legislation, President Obama has decided to approve it through executive measures. The Paris Agreement provides a sustainable framework that guides global efforts for decades to come. The aim is to create a continuous cycle that prevents countries from increasing their ambitions over time. In order to encourage increased ambitions, the agreement defines two interconnected processes, each with a five-year cycle.
The first is a “comprehensive state of affairs” to assess the collective progress made in achieving the long-term goals of the agreement. The parties will then submit new NDCs “informed of the results of the global inventory.” The main outcomes of the agreement are the most important: before the Paris conference, 189 countries – including each African country – presented a national climate plan, known as the planned national contribution, which determines what they will do to combat climate change and what more they will do when funding becomes available. In Paris, countries agreed to present updated plans every five years detailing ongoing activities and efforts to achieve the goals of the Paris Agreement. Each plan is expected to be more ambitious than the previous one. Under U.S. law, U.S. participation in an international agreement may be denounced by a president acting on the executive branch or by an act of Congress, regardless of how the United States acceded to the agreement. The Paris agreement stipulates that a party cannot withdraw from the agreement within the first three years of its entry into force. If the United States joined the agreement, it would be technically necessary to implement an NDC within 30 days. In the agreements adopted in Copenhagen in 2009 and Cancun in 2010, governments set a target of keeping global temperature increases below 2 degrees Celsius above pre-industrial levels. The Paris Agreement reaffirms the 2-degree target and insists that the increase be limited to 1.5 degrees Celsius.
The agreement also sets two other long-term mitigation objectives: first, a peak in emissions as soon as possible (recognizing that it will take longer for developing countries); a goal of net neutrality of greenhouse gases (“a balance between anthropogenic emissions from sources and distance by wells”) in the second half of the century. The broad principles that form the basis of South Africa`s commitment to reducing global CO2 emissions of equity, accountability, capacity and sustainable development are essential for all activities now and in the future. It is also recognized that developed countries responsible for setting up current global emission levels have a responsibility to assist developing countries that are tasked with contributing to overall emission reductions by providing climate finance and other technological know-how so that they can meet their country-by-country reduction commitments.