The Paris climate agreement is a landmark international treaty aimed at reducing global greenhouse gas emissions and mitigating the significant impacts of climate change. As a country that has always been at the forefront of global environmental protection, the United States played a crucial role in the creation and signing of this agreement.

The Paris climate agreement was first adopted by consensus on December 12, 2015, during the 21st Conference of the Parties (COP21) to the United Nations Framework Convention on Climate Change (UNFCCC) held in Paris, France. The agreement was attended by more than 190 countries, including the United States.

On that day, world leaders from different countries pledged to work together to limit global warming by reducing greenhouse gas emissions and increasing their efforts to adapt to the impacts of climate change. The Paris climate agreement called for each participating country to set their own goals and create a plan to reduce their emissions while reporting their progress regularly.

After the Paris agreement was adopted, it went through a legal process of ratification by each participating country. In the United States, the Paris agreement was ratified by the administration of former President Barack Obama on September 3, 2016. The ratification process required submission of the treaty to the Senate, which gave its advice and consent, allowing the President to ratify the agreement.

However, on June 2017, President Donald Trump announced that the United States would withdraw from the Paris climate agreement, arguing that the agreement would hurt the US economy and disadvantage the country in trade negotiations. The withdrawal process was then initiated and officially completed on November 4, 2020, just one day after the US presidential election.

Despite this setback, many US state and local governments and businesses have committed to reducing US greenhouse gas emissions and working towards the goals set in the Paris climate agreement. And now, with the United States’ recent rejoining of the agreement under President Joe Biden, the country is once again playing an active role in the collective global efforts to address the pressing issue of climate change.

In conclusion, the United States signed the Paris climate agreement on September 3, 2016, under the Obama administration but withdrew from the agreement in 2017. However, after several years, President Joe Biden`s administration has decided to rejoin the agreement, acknowledging the critical need for cooperation in addressing the challenge of climate change.