The IPCC notes that climate change is limited only by a “substantial and sustainable reduction in greenhouse gas emissions.” While the benefits of presenting a single global temperature threshold as a dangerous climate change can be discussed, the general scientific view is that an increase in global temperatures of more than 2 degrees Celsius would be an unacceptable risk – potentially leading to mass extinctions, more severe droughts and hurricanes, and an arid region. While it is not clear that global warming will cause “sudden and irreversible changes” in Earth`s systems, the risk of exceeding the threshold only increases if temperatures rise. The level of the NDC set by each country will determine the objectives of that country. However, the “contributions” themselves are not binding under international law because of the lack of specificity, normative nature or language necessary to establish binding standards.  In addition, there will be no mechanism to compel a country to set a target in its NDC on a specified date and not for an application if a defined target is not achieved in an NDC.   There will be only a “Name and Shame” system  or as UN Deputy Secretary General for Climate Change, J. Pésztor, CBS News (US), a “Name and Encouragement” plan.  Since the agreement has no consequences if countries do not live up to their commitments, such a consensus is fragile. A cattle of nations withdrawing from the agreement could trigger the withdrawal of other governments and lead to the total collapse of the agreement.
 On 12 December 2015 the text of the Paris Agreement, a legally binding pact containing all the elements necessary to develop a comprehensive strategy to combat climate change after 2020 – the period before 2020 is covered by the second stage of the Kyoto Protocol (the Doha Amendment). Some of the main points are summarized: the implementation of the Paris Agreement has been underway in recent years, one of the most important steps being the adoption of the regulations of the Paris Agreement (Katowice Rulebook) at the Katowice climate summit (COP 24). This document allows, among other things, to enter into force the different information and commitments and compare them as for the same ones; monitoring compliance with the agreement, the overall diagnostic methodology to be developed; The adaptation and technology transfer issues that will be strengthened; Negotiations for climate finance, which are expected to be launched by 2025. As the graph above shows, other steps have been taken since 1992 during negotiations at events such as the COP (Conference of the Parties). Here are the main agreements on climate change: the objective of the agreement is to reduce global warming described in Article 2 and to integrate the implementation of the UNFCCC by: during successive conferences of the parties – known as COP – new elements in the international structure of climate change negotiations. These elements address specific challenges such as financing the fight against climate change, adapting to climate change and transferring technology. As part of this debate, important climate agreements have developed in the pursuit of emissions reductions.