A/HRC/40/18 and other actors but also to the United Nations, as their reports also relate to various aspects of the work of the United Nations. 6. Several reports related to the implementation of the Sustainable Development Goals. They included the reports of the Special Rapporteur on the implications for human rights of the environmentally sound management and disposal of hazardous substances and wastes, the Special Rapporteur on the sale and sexual exploitation of children, including child prostitution, child pornography and other child sexual abuse material, the Special Rapporteur on the right to development, the Special Rapporteur on the rights to freedom of association and of peaceful assembly and the Working Group on the use of mercenaries as a means of violating human rights and impeding the exercise of the right of peoples to selfdetermination. 7. Mandate holders also made concrete recommendations on how to enhance the preventive approach of the United Nations by, for example, producing the joint study on transitional justice and the prevention of atrocities referred to in paragraph 15. 8. Several reports related to migration issues. Those reports included those of the Independent Expert on human rights and international solidarity, the Special Rapporteur on trafficking in persons, especially women and children, the Special Rapporteur on contemporary forms of racism, racial discrimination, xenophobia and related intolerance, the Special Rapporteur on the right of everyone to the enjoyment of the highest attainable standard of physical and mental health and the Special Rapporteur on torture and other cruel, inhuman or degrading treatment or punishment. The focus of the reports of the Special Rapporteur on the human rights of migrants was on returns and reintegration and effective access to justice. 9. Economic issues were examined in such reports as that of the Special Rapporteur on contemporary forms of slavery, including its causes and consequences, which related to the impact of slavery and servitude on marginalized migrant women workers in the global domestic economy. The reports of the Independent Expert on the effects of foreign debt and other related international financial obligations of States on the full enjoyment of all human rights, particularly economic, social and cultural rights, related, for their part, to the development of guiding principles for assessing the human rights impact of economic reform policies and the impact of economic policy reforms and austerity measures on women’s human rights. The report of the Working Group on the issue of human rights and transnational corporations and other business enterprises focused on the role of the State as an economic actor, while that of the Special Rapporteur on extreme poverty and human rights focused on the role of the International Monetary Fund and the impact of its programmes on social protection. 10. Issues related to peace and security were addressed by the Special Rapporteur on the right to food, who dealt with humanitarian crises, disasters and the right to food, and the Special Rapporteur on the human rights to safe drinking water and sanitation, who reported on access to water and sanitation for forcibly displaced persons. The right to education for refugees was the focus of the Special Rapporteur on the right to education, while the Working Group on mercenaries reported on the recruitment of children by non-State armed groups, including mercenaries and private military and security companies. In addition, the Special Rapporteur on the human rights of internally displaced persons proposed an agenda for strategic and joint action on the occasion of the twentieth anniversary of the Guiding Principles on Internal Displacement. The Special Rapporteur on trafficking in persons examined the gender dimension of trafficking in persons in conflict and post-conflict settings, in particular as it related to the women and peace and security agenda of the Security Council. The Special Rapporteur on freedom of religion or belief studied the relationship between freedom of religion or belief and national security. The Special Rapporteur on extrajudicial, summary or arbitrary executions studied armed non-State actors and the protection of the right to life. Finally, the Special Rapporteur on the promotion and protection of human rights and fundamental freedoms while countering terrorism addressed the impact on the protection and promotion of human rights and, inter alia, international humanitarian law following the adoption of multiple resolutions regulating terrorism by the Security Council in the period after 11 September 2001. 2