A/HRC/34/27 for all children, and for both girls and boys (see A/HRC/29/30). All children must have a fair chance in life through equal access to quality education, in accordance with their rights and with commitments under target 4.1 in this respect. It is vital that States take decisive steps to ensure that no child is excluded from education on the basis of their family’s ability to pay. Water, sanitation and hygiene 34. Goal 6 on sustainable water, sanitation and hygiene for all contains key commitments to universal, equitable access, with particular attention to the specific needs of women and girls, and people in situations of vulnerability (target 6.2). Water, sanitation and hygiene are essential to children’s survival and the fulfilment of their right to life, yet over 800 children under 5 years of age still die every day from diarrhoea associated with unsafe water, sanitation and poor hygiene. These conditions are also linked to stunting in children, compromising their physical and cognitive development. Fulfilling water, sanitation and hygiene commitments for all children is necessary to ensuring inclusive and equitable outcomes across the Sustainable Development Goal targets and particularly the fulfilment of goals on health, nutrition and education. A healthy planet and safe, sustainable environment 35. Children are at heightened physical vulnerability to environmental degradation and pollution, and they are disproportionately affected by natural disasters and emergencies linked to climate change. Children in the poorest countries and from the most disadvantaged communities are particularly affected. For example, hazardous substances in food, water and air have a disproportionate impact on children due to their developing physiology and higher exposure levels. National and international actions to protect ecosystems, develop sustainable cities and bring about decisive action on climate change, as well as sustainable energy and infrastructure, are all crucial to underpinning the protection of children’s rights in multiple respects. C. Special measures to support national implementation of the 2030 Agenda in a manner in which the rights of the child are realized 36. In order to fulfil the obligation and commitment to implement the Sustainable Development Goals in accordance with the Convention on the Rights of the Child, child rights principles should guide every aspect of the implementation process, including universality, the indivisibility of their rights, non-discrimination and equality, the best interests of the child, their right to survival and development, and the right of children to participate. 14 As States embark on the integration of the 2030 Agenda into national priorities and actions, special measures for the protection and inclusion of all children must be put in place throughout planning, financing, implementation, monitoring and follow-up processes. An essential step in this respect will be taking account of the particular circumstances and groups of children at greatest risk of being left behind, including children living in the most vulnerable and marginalized situations, and those subject to discrimination. This requires taking stock of patterns of unequal access to services and opportunities in different national contexts, in order to address the drivers of discrimination and exclusion. 14 10 See Committee on the Rights of the Child, general comment No. 14 (2013) on the right of the child to have his or her best interests taken as a primary consideration.