Understanding the Paris Agreement Entry into Force

The Paris Agreement is a landmark international treaty adopted in 2015, aimed at addressing climate change and its negative impacts. For this crucial agreement to become legally binding and operational, specific conditions were set for its entry into force.

These conditions were designed to ensure that the agreement had sufficient global support and covered a significant portion of global emissions before it could take effect. The requirements were twofold:

1. A minimum number of countries needed to formally join or 'ratify' the agreement.
2. These countries, collectively, needed to represent a certain percentage of the total global greenhouse gas emissions.

Conditions for Paris Agreement Entry into Force

The Paris Agreement stipulates that it would enter into force on the 30th day after the date on which at least:

• 55 countries that are parties to the United Nations Framework Convention on Climate Change (UNFCCC) have deposited their instruments of ratification, acceptance, approval, or accession.
• These 55+ countries collectively account for at least 55% of the total global greenhouse gas emissions as of 2014.

Both of these conditions had to be met for the agreement to take effect. Once the threshold of both 55 countries and 55% of global emissions was reached, the clock started for the 30-day waiting period.

The requirements can be summarized in the table below:

These conditions were successfully met on October 5, 2016, and consequently, the Paris Agreement officially entered into force on November 4, 2016.

Therefore, the instruments of ratification needed to be deposited by at least 55 countries which accounted for at least 55% of global CO\(_2\) emissions.

Revision Table: Key Paris Agreement Concepts

Additional Information on Climate Agreements

The Paris Agreement built upon previous international efforts to address climate change, such as the Kyoto Protocol. While the Kyoto Protocol set binding emission reduction targets only for developed countries, the Paris Agreement requires all parties to contribute to climate action through Nationally Determined Contributions (NDCs).

• Nationally Determined Contributions (NDCs): These are national climate plans outlining climate action targets, policies, and measures that countries aim to implement. Each country's successive NDC is expected to be more ambitious than the previous one.
• Long-Term Goals: The agreement aims to limit the global average temperature increase to well below 2°C above pre-industrial levels, and pursue efforts to limit the increase to 1.5°C.
• Global Stocktake: A process held every five years to assess the collective progress towards achieving the purpose of the Agreement and its long-term goals.

Understanding the entry into force conditions highlights the significant international cooperation required to tackle global challenges like climate change effectively.