The US has officially joined Paris Climate Agreement once again, 107 days after separating from the Paris Climate Agreement. United Nations chief Antonio Guterres described it as a ‘day of hope’ for the world. United Nations chief Antonio Guterres said that the absence of a key member for four years undermined this historic agreement. He said that today is a day of hope, as the United States has officially joined the Paris Agreement. It is an agreement under the United Nations Framework Convention on Climate Change (UNFCCC). The agreement was signed in the year 2016 and is related to climate