This chapter reviews the current status in the international environmental effort. The authors compare notes on the environmental challenges in air pollution, stewardship of the seas and nature conservation and biodiversity. What characterises the various multilateral environmental agreements (MEAs) - or regimes - within each of these major areas? What are their similarities and differences? How well do they perform and how can it be explained? To round off the authors discuss what can be done to strengthen international cooperation in the field of the environment and the possibilities of achieving this.