The Paris Agreement is an international agreement on climate change that was signed on December 12th, 2015. The agreement was designed to limit global warming to well below 2 degrees Celsius above pre-industrial levels and to pursue efforts to limit the temperature increase to 1.5 degrees Celsius.

The Paris Agreement was signed by 196 countries and the European Union, making it one of the most comprehensive and far-reaching agreements in the history of international climate diplomacy. The agreement was hailed as a major step forward in the fight against climate change and was seen as evidence of the growing international consensus on the need for urgent action on climate change.

The countries that signed the Paris Agreement were from all over the world, including developed and developing nations, and represented a wide range of economic, social, and political systems. Some of the major countries that signed the agreement include:

1. United States: The United States is one of the largest economies in the world and a major contributor to greenhouse gas emissions. Although the U.S. withdrew from the Paris Agreement in November 2020 under the Trump administration, it has since rejoined under the Biden administration.

2. China: China is the largest emitter of greenhouse gases in the world and has made significant commitments to reduce its emissions under the Paris Agreement.

3. India: India is one of the fastest-growing economies in the world and is also one of the largest emitters of greenhouse gases. The country has committed to reducing emissions while continuing to pursue economic growth.

4. European Union: The European Union is a major economic and political bloc that includes 27 member states. The EU has made significant commitments under the Paris Agreement and is working to reduce emissions across all member states.

5. Japan: Japan is a major developed economy and has made significant commitments to reducing emissions under the Paris Agreement.

6. Brazil: Brazil is a major economy and a significant emitter of greenhouse gases due to deforestation and other activities. The country has committed to reducing emissions and protecting its forests under the Paris Agreement.

7. Canada: Canada is a major economy and a significant emitter of greenhouse gases due to its oil and gas industry. The country has committed to reducing emissions and transitioning to a low-carbon economy under the Paris Agreement.

8. Russia: Russia is a major economy and a significant emitter of greenhouse gases due to its large oil and gas industries. The country has made commitments to reducing emissions under the Paris Agreement.

9. Australia: Australia is a major economy and a significant emitter of greenhouse gases due to its reliance on coal for energy. The country has committed to reducing emissions and transitioning to a low-carbon economy under the Paris Agreement.

10. South Africa: South Africa is a major economy in Africa and a significant emitter of greenhouse gases due to its reliance on coal for energy. The country has committed to reducing emissions and transitioning to a low-carbon economy under the Paris Agreement.

In conclusion, the Paris Agreement was a historic moment in the fight against climate change, and the countries that signed it demonstrated their commitment to protecting the planet for future generations. While there is still much work to be done to meet the goals of the agreement, the international community has taken an important step forward in addressing one of the greatest challenges facing humanity today.