Buildings and Cities

This page is about the intersection of urban planning and machine learning in the context of climate change mitigation and adaptation. For an overview of buildings and cities as a whole, please see the Wikipedia page on this topic.

A schematic of selected opportunities to reduce greenhouse emissions from buildings and cities using machine learning. From "Tackling Climate Change with Machine Learning."

Buildings offer some of the lowest-hanging fruit when it comes to reducing GHG emissions. While the energy consumed in buildings is responsible for a quarter of global energy-related emissions, a combination of easy-to-implement fixes and state-of-the-art strategies could reduce emissions for existing buildings by up to 90%. It is possible today for buildings to consume almost no energy. Many of these energy efficiency measures actually result in overall cost savings and simultaneously yield other benefits, such as cleaner air for occupants. This potential can be achieved while maintaining the services that buildings provide – and even while extending them to more people, as climate change will necessitate. For example, with the changing climate, more people will need access to air conditioning in regions where deadly heat waves will become common.

Two major challenges are heterogeneity and inertia. Buildings vary according to age, construction, usage, and ownership, so optimal strategies vary widely depending on the context. For instance, buildings with access to cheap, low-carbon electricity may have less need for expensive features such as intelligent light bulbs. Buildings also have very long lifespans; thus, it is necessary both to create new, energy-efficient buildings, and to retrofit old buildings to be as efficient as possible. Urban planning and public policy can play a major role in reducing emissions by providing infrastructure, financial incentives, or energy standards for buildings.

Machine learning provides critical tools for supporting both building managers and policy makers in their efforts to reduce GHG emissions. At the level of building management, ML can help select strategies that are tailored to individual buildings, and can also contribute to implementing those strategies via smart control systems. At the level of urban planning, ML can be used to gather and make sense of data to inform policy makers. In addition, ML can help cities as a whole to transition to low-carbon futures.

Machine Learning Application Areas

Optimizing buildings

• Modeling building energy
• Smart buildings

Urban planning

• Modeling energy use across buildings
• Gathering infrastructure data

The future of cities

• Data for smart cities
• Low-emissions infrastructure

Background Readings

Relevant IPCC chapters

• Chapter 9: "Buildings" in the IPCC Fifth Assessment Report (2014): An overview of issues related to the mitigation of greenhouse gas emissions (GHG) from the buildings sector.
• Chapter 12: "Human Settlements, Infrastructure and Spatial Planning" in the IPCC Fifth Assessment Report (2014): An overview of issues related to the mitigation of greenhouse gas emissions (GHG) from urban areas.

Academic perspectives

• Six research priorities for cities and climate change, Bai, X., et al. (2018): Leading urban sustainability researchers call for long-term, cross-disciplinary studies to reduce carbon emissions and urban risks from global warming.
• Sustainability in an urbanizing planet, by Seto, K C., et al. (2017): This introduction to a special issue in PNAS enumerates key common themes, knowledge gaps and research priorities towards sustainability in an urbanizing planet.
• Carbon lock-in: types, causes, and policy implications, by Seto, K,C., et al. (2016): This is an authoritative review of carbon lock-ins, the phenomenon of inertia in carbon emissions, for example due to long-lived infrastructure, and which a key issue for climate change mitigation in cities.
• The urban south and the predicament of global sustainability, by Nagendra, H,, et al.(2018): This piece highlights the challenges to achieve sustainability in cities from the Global South. The authors call for a renewed research focus, and targeted efforts to correct structural biases in the knowledge production system.
• Internet of Things: Energy boon or bane?, by Hittinger, E,, and Jaramillo, P. (2019): This short piece discussed direct and indirect impacts on energy systems of Internet of Things technologies.

Perspectives in popular media

• The air conditioning trap: how cold air is heating the world: This long read from the Guardian introduces the issue of indoors cooling in a warming world, and interlinkages between climate change mitigation and adaptation.

Data

TODO format

Building energy use

• New York City municipal buildings for buildings over 10,000 square feet, identifying each building’s energy intensity, and available GHG emissions for the calendar years 2010-2014.
• The Commercial Buildings Energy Consumption Survey (CBECS) is a national sample survey that collects information on the stock of U.S. commercial buildings, their energy-related building characteristics, and their energy consumption and expenditures.

City metabolism

The "metabolism" of a city includes the electricity used, waste generated, and GHG emitted.

• Metabolism data for 150 cities
• The China Emission Accounts & Datasets provides energy, emission and socio-economic accounting inventories for China
• First attempts of global databases on cities emissions and relevant ancillary metrics
• The Carbon Disclosure Project provides a global platform for cities to measure and disclose environmental data; a variety of datasets are available

Urban Land Use, Infrastructure Data

• OpenStreetMap is a cooperative alternative to Google Maps where all the data is open access.
• NYU’s Atlas of Urban Expansion contains historical data on 200 cities worldwide.
• Open 3D models are available for a few cities.
• The Urban Atlas of the European Union agency Copernicus includes information on urban land use types.
• The TABULA project combines data on building types across all of Europe.