1. Introduction
2. Problems, principles and terminology
3. The principle of equitable utilization
4. The rule on prevention of significant harm
5. Equity and the utilization of shared natural resources
6. Factors relating to the equitable utilization of international watercourses
7. Environmental protection of international watercourses I : substantive rules of customary and general international law
8. Environmental protection of international watercourses II : procedural rules of customary and general international law
9. Conclusion : environmental protection as a factor in determining the equitable utilization of international watercourses.