To combat climate change and its negative effects, 197 countries adopted the Paris Agreement at COP21 on 12 December 2015 in Paris. The agreement, which came into force less than a year later, aims to significantly reduce global greenhouse gas emissions and limit global temperature rise to 2 degrees Celsius this century, while continuing to limit the rise to 1.5 degrees. The Paris Agreement contains a series of binding measures to monitor, verify and publicly report progress towards a country`s emissions reduction targets. Improving transparency rules applies a common framework to all countries, providing housing and support to nations that are not currently able to strengthen their systems over time. International agreements are initially signed to indicate their intention to do so, but they only become binding through ratification. It may be an act of Parliament or some other formal adoption. Processes vary from country to country. Former U.S. President Barack Obama used controversial executive powers to ratify the 2016 Paris Agreement. Unlike the Kyoto Protocol, which set legally binding emission reduction targets (as well as penalties for non-compliance) only for industrialized countries, the Paris Agreement requires all countries – rich, poor, developed and developing – to take their share and reduce their greenhouse gas emissions. To this end, the Paris Agreement provides for greater flexibility: commitments that countries should make are not included, countries can voluntarily set their emissions targets and countries will not be penalized if they do not meet their proposed targets. But what the Paris agreement requires is to monitor, report and reassess, over time, the objectives of individual and collective countries, in order to bring the world closer to the broader objectives of the agreement.
And the agreement stipulates that countries must announce their next round of targets every five years, contrary to the Kyoto Protocol, which was aimed at this target but which contained no specific requirements to achieve this goal. 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 August 4, 2017, the Trump administration sent an official message to the United Nations that the United States is the take-off.