Ksentini was a part of the "Sub-Commission on Prevention of Discrimination and Protection of Minorities". It was when she was named "special rapporteur" on Human Rights and the Environment in 1989. For the United Nations Commission on Human Rights, she started a four-year search work into environmental human rights in 1990. After completing her research in 1994, she submitted her findings to the "Draft Declaration of Principles on Human Rights and the Environment".