Which are the institutes / universities that have exceptional strength in the field of international environmental law?

The University of Oregon is in the highest ranks for reputation among scholars of environmental law and among practicing environmental lawyers around the world.

The University of Oregon's LLM is directed by professors who are experts in international and national environmental law. They also are deeply involved in international environmental law in Europe and elsewhere.

See http://www.law.uoregon.edu/LLM or http://www.llm-guide.com/university/636/university-of-oregon/

The LLM Director serves as Vice Chair of the Compliance Committee under the United Nations' Aarhus Public Participation Convention. She travels to Geneva four times per year to consider cases brought against countries for violation of the Convention.

Another professor is Founder of the Environmental Law Alliance Worldwide (see http://www.elaw.org), a network in 70 countries that includes all of the world's leading environmental lawyers. The network also is based in an office near the University of Oregon and it accepts interns from Oregon's LL.M. Program.

Another Oregon professor is the world's foremost proponent of the "nature's trust" approach for controlling global warming.

Other professors at Oregon include the former legal counsel to TransAfrica, a professor who spent the past 10 years working in Peru, a leading theorist in geography and environmental law, an expert in environmental taxation, a young star in the field of water law, and many others. Professors can be seen at http://www.law.uoregon.edu/LLM/faculty.html

One of the great advantages to the University of Oregon is that it is in a city with great cultural events, but it is one hour from the Pacific Ocean and 1-1/2 hours from snow-capped skiing mountains. The LLM program takes its students to all these places on its academic field trips. Take a look at http://www.law.uoregon.edu/LLM/trips.html