To permit the summation of population values by country/territory and, in combination with other data layers, the summation of population values by irregular areas represented in the other data layers and country/territory.

To provide the ATSDR polygon data set of hazardous waste sites in the United States, Puerto Rico, and other territories which can be used to identify nearby populations and assess their potential risk.

To provide tabular data on environmental conditions (elevations, climate, coastal) in which people reside.

To provide estimates of urban and rural populations and land areas in the low elevation coastal zone.

To provide gridded demographic data, including characteristics of age, race, ethnicity, and housing, for the United States and Puerto Rico for data integration.

To provide gridded demographic data, including characteristics of income, education, and housing, for metropolitan statistical areas at a finer resolution than is available in the 30 arc-second grids used for the United States as a whole.

To provide gridded demographic data, including characteristics of income, education, and housing, for the United States and Puerto Rico for data integration.

To provide gridded demographic data, including characteristics of age, race, ethnicity, and housing, for metropolitan statistical areas at a finer resolution than is available in the 30 arc-second grids used for the United States as a whole.

To make the acquisition, comparison and analysis of sustainability indicators easier by compiling them in a single database, incorporating multiple country codes, and condensing the indicator descriptions into short methodological summaries in an accompanying data dictionary.

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

To preserve access to the original set of socioeconomic and natural resource scenarios used by the Millennium Ecosystem Assessment (MA) and other related research.

To provide a time series of raster data on population to facilitate data integration.

To provide a time series of raster data on population projected to the year 2015 to facilitate data integration.

To provide a time series of raster data on population projected to the year 2015 to facilitate data integration.

To provide a time series of raster data on population density to facilitate data integration.

To provide a gridded data on country-level population and downscaled projections based on the SRES B2 marker scenario.

To provide data on country-level population and downscaled projections based on the SRES B2 marker scenario.

To provide data on country-level population and downscaled projections based on the SRES A1, B1, and A2 marker scenarios.

To provide tabular data on environmental conditions (elevations, climate, coastal) in which people reside.

To provide attribute and boundary data for Mexico for conducting assessments of human interactions with the environment.