CRC/C/15/Add.119 page 8 play the most important role in this regard, nevertheless cultural attitudes, and lack of personal knowledge and communication skills on the part of parents are barriers to accurate reproductive health information and counselling. 39. The Committee recommends that the State party undertake a comprehensive study on the nature and extent of adolescent health problems, to be used as a basis for formulating adolescent health policies. In the light of article 24, the Committee recommends that adolescents have access to and be provided with reproductive health education, and child-friendly counselling and rehabilitation services. 40. The Committee expresses its concern at the high incidence of environmental threats, including contamination of water supplies, which have a negative impact on the health of children. The Committee is concerned that there is insufficient data on access to clean water and sanitation. 41. In the light of article 24 (c) of the Convention, the Committee recommends that the State party take all appropriate measures, including international cooperation, to prevent and combat the damaging effects of environmental degradation on children, including pollution and contamination of water supplies. The Committee encourages the State party to collect data on access to clean water and sanitation. Right to an adequate standard of living (art. 27) 42. The Committee is concerned about the situation of children living and/or working on the streets, who are amongst the most marginalized groups of children in Armenia. 43. The Committee recommends the State party establish mechanisms to ensure these children are provided with identity documents, nutrition, clothing, and housing. Moreover, the State party should ensure these children have access to health care; rehabilitation services for physical, sexual, and substance abuse; services for reconciliation with families; comprehensive education, including vocational and life-skills training; and access to legal aid. The State party should cooperate and coordinate its efforts with civil society in this regard. The Committee recommends that the State party undertake a study on the nature and extent of the phenomenon. D.7. Education, leisure and cultural activities Right and aims of education (arts. 28 and 29) 44. In line with the Committee on Economic, Social and Cultural Rights (E/C.12/1/Add.39), the Committee is concerned at the decline in budgetary allocation to the education sector, and the deterioration in the quality of education. The Committee remains concerned at the persistence of high drop-out, repetition and absenteeism rates, as well as poor access to education in rural areas. Moreover, in line with the Committee on the Elimination of Racial Discrimination (CERD/C/304/Add.51), the Committee expresses its concern that the requirement for teaching in