Which of the following is NOT a treaty for the global commons?

The correct answer is Option 1 - Maastricht Treaty

Maastricht Treaty is NOT a treaty for the global commons. It is the treaty that established the European Union.

Cooperation over the global commons is not easy. There have been many path-breaking agreements such as the 1959 Antarctic Treaty, the 1987 Montreal Protocol, and the 1991 Antarctic Environmental Protocol.