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Targets instruments
Instrument Article / Description Target Indicator
UDHR
Universal Declaration of Human Rights 		25.1
Everyone has the right to a standard of living adequate for the health and well-being of himself and of his family, including food, clothing, housing and medical care and necessary social services, and the right to security in the event of unemployment, sickness, disability, widowhood, old age or other lack of livelihood in circumstances beyond his control.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
ICESCR
International Covenant on Economic, Social and Cultural Rights 		11.1
The States Parties to the present Covenant recognize the right of everyone to an adequate standard of living for himself and his family, including adequate food, clothing and housing, and to the continuous improvement of living conditions. The States Parties will take appropriate steps to ensure the realization of this right, recognizing to this effect the essential importance of international co-operation based on free consent.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
ICERD
International Convention on the Elimination of All Forms of Racial Discrimination 		5.e.iii
The right to housing;
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
CEDAW
Convention on the Elimination of All Forms of Discrimination Against Women 		14.2.h
To enjoy adequate living conditions, particularly in relation to housing, sanitation, electricity and water supply, transport and communications.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
CRPD
Convention on the Rights of Persons with Disabilities 		9.1.a
Buildings, roads, transportation and other indoor and outdoor facilities, including schools, housing, medical facilities and workplaces;
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
28.1
States Parties recognize the right of persons with disabilities to an adequate standard of living for themselves and their families, including adequate food, clothing and housing, and to the continuous improvement of living conditions, and shall take appropriate steps to safeguard and promote the realization of this right without discrimination on the basis of disability.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
ICRMW
International Convention on the Protection of the Rights of All Migrant Workers and Members of Their Families 		43.1.d
Access to housing, including social housing schemes, and protection against exploitation in respect of rents;
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
UNDRIP
United Nations Declaration on the Rights of Indigenous Peoples 		21.1
Indigenous peoples have the right, without discrimination, to the improvement of their economic and social conditions, including, inter alia, in the areas of education, employment, vocational training and retraining, housing, sanitation, health and social security.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
Escazú Agreement
Regional Agreement on Access to Information, Public Participation and Justice in Environmental Matters in Latin America and the Caribbean 		4.5
Each Party shall ensure that guidance and assistance is provided to the public —particularly those persons or groups in vulnerable situations— in order to facilitate the exercise of their access rights.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
5.2
The exercise of the right of access to environmental information includes:
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
5.2.a
requesting and receiving information from competent authorities without mentioning any special interest or explaining the reasons for the request;
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
5.2.b
being informed promptly whether the requested information is in possession or not of the competent authority receiving the request;
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
5.2.c
being informed of the right to challenge and appeal when information is not delivered, and of the requirements for exercising this right.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
5.3
Each Party shall facilitate access to environmental information for persons or groups in vulnerable situations, establishing procedures for the provision of assistance, from the formulation of requests through to the delivery of the information, taking into account their conditions and specificities, for the purpose of promoting access and participation under equal conditions.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
5.4
Each Party shall guarantee that the above-mentioned persons or groups in vulnerable situations, including indigenous peoples and ethnic groups, receive assistance in preparing their requests and obtain a response.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
6.1
Each Party shall guarantee, to the extent possible within available resources, that the competent authorities generate, collect, publicize and disseminate environmental information relevant to their functions in a systematic, proactive, timely, regular, accessible and comprehensible manner, and periodically update this information and encourage the disaggregation and decentralization of environmental information at the subnational and local levels. Each Party shall strengthen coordination between the different authorities of the State.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
6.3.i
an estimated list of waste by type and, when possible, by volume, location and year; and
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
6.3
Each Party shall have in place one or more up-to-date environmental information systems, which may include, inter alia:
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
6.3.b
reports on the state of the environment;
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
6.3.c
a list of public entities competent in environmental matters and, where possible, their respective areas of operation;
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
6.3.d
a list of polluted areas, by type of pollutant and location;
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
6.3.h
information on environmental impact assessment processes and on other environmental management instruments, where applicable, and environmental licences or permits granted by the public authorities;
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
6.6
In order to facilitate access by persons or groups in vulnerable situations to information that particularly affects them, each Party shall endeavour, where applicable, to ensure that the competent authorities disseminate environmental information in the various languages used in the country, and prepare alternative formats that are comprehensible to those groups, using suitable channels of communication.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
6.9
Each Party shall promote access to environmental information contained in concessions, contracts, agreements or authorizations granted, which involve the use of public goods, services or resources, in accordance with domestic legislation.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
6.10
Each Party shall ensure that consumers and users have official, relevant and clear information on the environmental qualities of goods and services and their effects on health, favouring sustainable production and consumption patterns.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
6.12
Each Party shall take the necessary measures, through legal or administrative frameworks, among others, to promote access to environmental information in the possession of private entities, in particular information on their operations and the possible risks and effects on human health and the environment.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.1
Each Party shall ensure the public’s right to participation and, for that purpose, commits to implement open and inclusive participation in environmental decision-making processes based on domestic and international normative frameworks.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.2
Each Party shall guarantee mechanisms for the participation of the public in decision-making processes, revisions, re-examinations or updates with respect to projects and activities, and in other processes for granting environmental permits that have or may have a significant impact on the environment, including when they may affect health.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.3
Each Party shall promote the participation of the public in decision-making processes, revisions, re-examinations or updates other than those referred to in paragraph 2 of the present article with respect to environmental matters of public interest, such as land-use planning, policies, strategies, plans, programmes, rules and regulations, which have or may have a significant impact on the environment.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.4
Each Party shall adopt measures to ensure that the public can participate in the decision-making process from the early stages, so that due consideration can be given to the observations of the public, thus contributing to the process. To that effect, each Party shall provide the public with the necessary information in a clear, timely and comprehensive manner, to give effect to its right to participate in the decision-making process.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.5
The public participation procedure will provide for reasonable timeframes that allow sufficient time to inform the public and for its effective participation.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.6.c
the procedure foreseen for the participation of the public, including the date on which the procedure will begin and end, mechanisms for participation and, where applicable, the date and place of any public consultation or hearing; and
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.6.d
the public authorities involved from which additional information on the environmental decision under consideration can be requested and the procedure for requesting information.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.6
The public shall be informed, through appropriate means, such as in writing, electronically, orally and by customary methods, and in an effective, comprehensible and timely manner, as a minimum, of the following:
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.6.a
the type or nature of the environmental decision under consideration and, where appropriate, in non-technical language;
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.6.b
the authority responsible for making the decision and other authorities and bodies involved;
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.7
The public’s right to participate in environmental decision-making processes shall include the opportunity to present observations through appropriate means available, according to the circumstances of the process. Before adopting the decision, the relevant public authority shall give due consideration to the outcome of the participation process.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.8
Each Party shall ensure that, once a decision has been made, the public is informed in a timely manner thereof and of the grounds and reasons underlying the decision, including how the observations of the public have been taken into consideration. The decision and its basis shall be made public and be accessible.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.9
The dissemination of the decisions resulting from environmental impact assessments and other environmental decision-making processes in which the public has participated shall be carried out through appropriate means, which may include written, electronic or oral means and customary methods, in an effective and prompt manner. The information disseminated shall include the established procedure to allow the public to take the relevant administrative and judicial actions.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.10
Each Party shall establish conditions that are favourable to public participation in environmental decision-making processes and that are adapted to the social, economic, cultural, geographical and gender characteristics of the public.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.11
When the primary language of the directly affected public is different to the official languages, the public authority shall ensure that means are provided to facilitate their understanding and participation.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.12
Each Party shall promote, where appropriate and in accordance with domestic legislation, public participation in international forums and negotiations on environmental matters or with an environmental impact, in accordance with the procedural rules on participation of each forum. The participation of the public at the national level on matters of international environmental forums shall also be promoted, where appropriate.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.13
Each Party shall encourage the establishment of appropriate spaces for consultation on environmental matters or the use of those that are already in existence in which various groups and sectors are able to participate. Each Party shall promote regard for local knowledge, dialogue and interaction of different views and knowledge, where appropriate.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
7.14
The public authorities shall make efforts to identify and support persons or groups in vulnerable situations in order to engage them in an active, timely and effective manner in participation mechanisms. For these purposes, appropriate means and formats will be considered, in order to eliminate barriers to participation.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
13
Each Party, to the extent of its ability and in accordance with its national priorities, commits to provide the resources for national activities that are needed to fulfil the obligations derived from the present Agreement.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
European Social Charter
European Social Charter (Revised) 		Part II
The Parties undertake, as provided for in Part III, to consider themselves bound by the obligations laid down in the following articles and paragraphs.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
Part#II.31
With a view to ensuring the effective exercise of the right to housing, the Parties undertake to take measures designed:
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
Part#I.31
Everyone has the right to housing.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
Part#II.31.1
to promote access to housing of an adequate standard;
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
Part#II.31.2
to prevent and reduce homelessness with a view to its gradual elimination;
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
Part#II.31.3
to make the price of housing accessible to those without adequate resources.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
European Framework Convention on Minorities
Council of Europe Framework Convention for the Protection of National Minorities 		4.2
The Parties undertake to adopt, where necessary, adequate measures in order to promote, in all areas of economic, social, political and cultural life, full and effective equality between persons belonging to a national minority and those belonging to the majority. In this respect, they shall take due account of the specific conditions of the persons belonging to national minorities.
11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
ADRDM
American Declaration on the Rights and Duties of Man 		XI
Every person has the right to the preservation of his health through sanitary and social measures relating to food, clothing, housing and medical care, to the extent permitted by public and community resources
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
ACHR
American Convention on Human Rights 		26
The States Parties undertake to adopt measures, both internally and through international cooperation, especially those of an economic and technical nature, with a view to achieving progressively, by legislation or other appropriate means, the full realization of the rights implicit in the economic, social, educational, scientific, and cultural standards set forth in the Charter of the Organization of American States as amended by the Protocol of Buenos Aires.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
Protocol of San Salvador
Additional Protocol to the American Convention on Human Rights in the Area of Economic, Social and Cultural rights (Protocol of San Salvador) 		11.1
Everyone shall have the right to live in a healthy environment and to have access to basic public services.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
Inter-American Convention on discrimination against persons with disabilities
Inter-American Convention on the Elimination of All Forms of Discrimination against Persons with Disabilities 		III
To achieve the objectives of this Convention, the states parties undertake:
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
III.1
To adopt the legislative, social, educational, labor-related, or any other measures needed to eliminate discrimination against persons with disabilities and to promote their full integration into society, including, but not limited to:
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
III.1.a
Measures to eliminate discrimination gradually and to promote integration by government authorities and/or private entities in providing or making available goods, services, facilities, programs, and activities such as employment, transportation, communications, housing, recreation, education, sports, law enforcement and administration of justice, and political and administrative activities;
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
III.1.b
Measures to ensure that new buildings, vehicles, and facilities constructed or manufactured within their respective territories facilitate transportation, communications, and access by persons with disabilities;
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
III.1.c
Measures to eliminate, to the extent possible, architectural, transportation, and communication obstacles to facilitate access and use by persons with disabilities;
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
ACHPR
African Charter on Human and Peoples' Rights 		24
All peoples shall have the right to a general satisfactory environment favourable to their development.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
ACRWC
African Charter on the Rights and Welfare of the Child 		5.2
State Parties to the present Charter shall ensure, to the maximum extent possible, the survival, protection and development of the child.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing
Maputo Protocol
Protocol to the African Charter on Human and Peoples’ Rights on the Rights of Women in Africa 		16
Women shall have the right to equal access to housing and to acceptable living conditions in a healthy environment. To ensure this right, States Parties shall grant to women, whatever their marital status, access to adequate housing.
 11.1 (11. Sustainable cities and communities)

By 2030, ensure access for all to adequate, safe and affordable housing and basic services and upgrade slums.
11.1.1 Proportion of urban population living in slums, informal settlements or inadequate housing