The city as a determinant of the surrounding area will continue to grow as a characteristic of civilization. In 2045, it is estimated that around 70% of the population will live in cities. Not only in Indonesia, cities throughout the world are also facing increasingly complex environmental, social and economic challenges. Climate change, rapid urbanization, pollution, and increasing infrastructure needs are some of these challenges. The context of problems regarding urban ecology and urban heat energy is currently considered to be very minimal in terms of documentation, so through working group activities on the NUF activity agenda it is hoped that urban documentation can be made easier.

Within the scope of ecology and the urban environment, the role of ecosystems needs to be explored as a provider of basic needs. Efforts to integrate ecosystem-based approaches in city planning can increase resilience, including in climate change, natural disasters and other natural challenges. With a contribution of 80% of greenhouse gas emissions, cities produce significant changes to the natural environment, threatening biodiversity and ecosystems.

Data in Indonesia shows that the building subsector is the largest contributor to greenhouse gas emissions among all energy sectors, with an average of 33% during the 2011-2021 period.

The scope is quite broad, including environmental damage, urban poverty and its impacts, mass transportation, disasters and climate change. This WG encourages regenerative design as part of restoring the existence of urban ecology, not just repairing but also restoring it. Issues raised include the blue and green connection, CO2 emissions and their calculations, lessons learned from the pandemic, environmental control and urban health, awareness of the impact of climate change, food security, application of smart concepts and digitalization in solving ecological problems.