Already in 1972 the Stockholm Declaration stated:
Towards the end the paper discusses 'Key Trends in Sustainable Urban Development' and concludes with these two paragraphs:
As more and more people live in urban areas, coupled with worsening impacts from climate change and natural resource loss, the magnitude of the urban sustainability challenge and the need for decisive action is bigger than ever. As the world saw with the COVID-19 pandemic, overcrowding and poverty make it difficult to follow recommended measures such as social distancing and self-isolation. This calls for a holistic rethinking about how to make cities liveable for all while minimizing adverse impacts on the environment.
Striving for sustainable cities requires overcoming barriers between different levels of government as well as vested interests in preserving the status quo. It requires looking beyond the sphere of the urban to attend to urban-rural linkages, foster circular resource use, and decarbonize the energy, transport, and building sectors. Urban sustainability requires cross-sectoral planning and attention to the differentiated needs of all urban dwellers so as to leave no one behind in the necessary transformation. Sustainability pathways should be tailored to specific urban contexts. As such, there will never be one single model for what a sustainable city looks like.
Reading the policy brief I became aware how limited the progress was over half a century since the 1972 Stockholm Declaration. And it happens that today (28 April) in New York the United Nations General Assembly convenes a meeting to discuss the implementation of the New Urban Agenda which was adopted at the Habitat III conference in Quito in 2016. The event website recall the opportunities for sustainable urban planning but it also states:
And yet, the New Urban Agenda is poorly represented in the global discourse and receives little attention by member states and other relevant stakeholders. The High-Level Meeting, convened by the President of the General Assembly offers an opportunity for Member States to take stock of actions taken and put forward new commitments to revitalize the implementation of the New Urban Agenda.
Source: https://unhabitat.org/hlm-new-urban-agenda
The aim is to strengthen the New Urban Agenda and to accelerate the achievement of SDG. Of course, that cannot be achieve in a six hours stocktaking even on 28 April 2022 but it is part of a multipronged approach leading to a Habitat Assembly in 2023 (see graphic below).
Jennifer Bansard mentions in her policy brief 'the magnitude of the urban sustainability challenge and the need for decisive action' which is bigger than ever.
Apparently, there is plenty of talk about the SDG, the New Urban Agenda and that they are no on track to achieve goals. What I miss in the policy brief but also on the agenda of today's meeting in New York are three elements:
Firstly, a sound estimation of additional costs occurring around the world if no sufficiently decisive action is taken.
Secondly, a proposal on types of decisive action to be taken at international, national and local levels.
Thirdly, a clarification on who is responsible and accountable for actions to be taken and costs to be covered.
It's good to hold regular dialogues and to take stock but member states and stakeholders have to be true to themselves. Nothing good will happen unless somebody does it.