The world's most influential cooperation mechanisms include: the United Nations (UN), NATO (NATO), the World Trade Organization (WTO), the European Union (EU), and the Global Environment Facility (GEF).

1. United Nations (UN) The United Nations is an intergovernmental organization composed of countries. It was founded in 1945 and is headquartered in New York City.

Its main tasks are to maintain international peace and security, promote economic cooperation and development, and promote human rights protection.

There are many institutions under the United Nations, including the International Court of Justice, the Human Rights Council, etc.

2. NATO (NATO) NATO was established in 1949 and is a military alliance composed of North American and European countries.

Its main mission is to protect the security of member states and defend against foreign threats, such as terrorism, military invasion, etc.

There are close military cooperation and joint military exercises among its member states.

3. World Trade Organization (WTO) The World Trade Organization was established in 1995 and is headquartered in Geneva, Switzerland.

Its main mission is to promote free trade and reduce international trade barriers and promote the development of the global economy.

The organization has a dispute settlement body responsible for handling trade conflicts between member countries and negotiating solutions.

4. European Union (EU) The European Union was established in 1993 and is a political and economic union composed of European countries.

Its main task is to promote economic cooperation and political unity among member states and jointly respond to global challenges.

The EU also has mechanisms such as a common market and a common currency, aiming to strengthen cooperation among member states.

5. Global Environment Facility (GEF) The Global Environment Facility was established in 1991. It is an environmental cooperation mechanism composed of the United Nations, international financial institutions and national governments.

Its main mission is to provide financial support and promote sustainable development of the global environment, and to protect and restore global ecosystems and biodiversity.

This mechanism provides financial support to governments and non-governmental organizations to promote environmentally sustainable development projects.