A study published in 2018 reports a threshold where temperatures could rise to 4 or 5 degrees above the pre-industrial level (ambiguous expression, continuity would be “4-5 °C”), thanks to self-concretizing feedbacks in the climate system, indicating that this threshold is below the 2 degree target set in the Paris Climate Agreement. Study author Katherine Richardson points out, “We find that, in its history, the Earth has never had a near-stable state about 2°C warmer than pre-industrial and we suggest that there is a considerable risk that the system itself, because of all these other processes, will want,” even if we stop emissions. This doesn`t just mean reducing emissions, but much more.  GCAS tried to send this clear and strong signal of support to San Francisco in 2018 to New York in 2019. (b) improving the capacity to adapt to the negative effects of climate change and to promote climate resilience and the development of low greenhouse gas emissions so as not to jeopardise food production; The Paris Agreement is the world`s first comprehensive climate agreement.  Image above: People celebrate the adoption of the Paris Agreement. Photo: UNclimatechange, Flickr While strengthening NDC ambitions is one of the main objectives of the global inventory, it assesses efforts that go beyond mastery. The five-year reviews will also assess adaptation, climate finance rules, and technology development and transfer.  On August 27, 2017, the Trump administration officially communicated to the United Nations that the United States intended to withdraw from the Paris Agreement as soon as there was a legal right to do so.  The withdrawal request could only be filed when the agreement for the United States entered into force on November 4, 2019 for a three-year sentence.   On November 4, 2019, the U.S. government deposited the withdrawal notification with the United Nations Secretary-General, depositary of the agreement, and formally withdrew from the Paris Climate Agreement a year later.  After the November 2020 election, President-elect Joe Biden pledged to reinstate the United States in the Paris Agreement on his first day in office and to renew America`s commitment to mitigate climate change.