The Paris Agreement is a historic climate agreement that was adopted by 196 parties at the 21st Conference of the Parties (COP21) to the United Nations Framework Convention on Climate Change (UNFCCC), held in Paris, France, in December 2015.

The Paris Agreement was the culmination of more than two decades of negotiations aimed at achieving a global response to climate change. The agreement aims to keep the global temperature rise this century well below 2 degrees Celsius above pre-industrial levels and to pursue efforts to limit the temperature increase even further to 1.5 degrees Celsius.

The Paris Agreement was a significant step forward in the fight against climate change. It was the first time that all countries, both developed and developing, agreed to take action to address climate change. The agreement represents a global effort to reduce greenhouse gas emissions and to adapt to the impacts of climate change.

The Paris Agreement entered into force on November 4, 2016, just one year after it was adopted. This was a remarkable achievement, as it normally takes many years for a treaty to enter into force. The speedy ratification of the Paris Agreement was a clear indication of the urgency of the climate crisis and the commitment of countries to take action.

The Paris Agreement has already had a significant impact on global climate action. Countries have submitted their national climate pledges, known as Nationally Determined Contributions (NDCs), which outline their plans to reduce greenhouse gas emissions and adapt to the impacts of climate change. These pledges are reviewed every five years, and countries are expected to increase the ambition of their commitments over time.

In conclusion, the Paris Agreement started at the United Nations Framework Convention on Climate Change (UNFCCC) in Paris, France, in December 2015. It entered into force on November 4, 2016, and represents a significant global effort to reduce greenhouse gas emissions and adapt to the impacts of climate change. The Paris Agreement is a critical step forward in the fight against climate change, and its impact will be felt for many years to come.