To provide urban center level estimates of the proportion of population that has convenient access to public transportation.

To provide urban center level estimates of the average share of the built-up area of cities that is open space for public use for all.

To provide a literature database tracking the use of the sub-global scenarios consisting of Shared Socioeconomic Pathways (SSPs) and Representative Concentration Pathways (RCPs) that extend the global SSP narratives and framework for climate, socioeconomic, environmental, and other related research.

To provide a framework of public-health-focused air quality indicators that quantifies country trends in exposure to major air pollutants.

To provide daily and annual Fine Particulate Matter (PM2.5), Ozone (O3), and Nitrogen Dioxide (NO2) concentrations data at ZIP Codes for the contiguous U.S. for research in environmental epidemiology, environmental justice, and health equity by linking with ZIP Code-level demographic and medical data sets, and for other related research.

To provide an annual global surface of concentrations (micrograms per cubic meter) of mineral dust and sea-salt filtered fine particulate matter of 2.5 micrometers or smaller (PM2.5) in countries and urban areas for large-scale health and environmental research

To provide a high-resolution, longitudinal global data set of extreme urban heat events and urban heat exposure.

To provide a literature database tracking the use of a global scenarios framework consisting of Shared Socioeconomic Pathways (SSPs), Representative Concentration Pathways (RCPs), and Shared Policy Assumptions (SPAs), for climate, socioeconomic, environmental, and other related research.

To provide populated place (point) data with consistent population estimates.

To provide a global data set of average summer daytime maximum/nighttime minimum land surface temperatures (LSTs) for urban extents, as well as the LST difference between the urban area and the buffer.

To provide an easily accessible, corrected EPA data set of the geo-referenced locations displayed as points for all the National Priorities List (NPL) Superfund sites in the United States, Puerto Rico, and other territories.

To provide populated place (point) data with consistent population estimates.

To preserve access to the original ecosystems data used by the Millennium Ecosystem Assessment (MA) and other related research.