Social ExplorerProvides access to census and demographic data, US and international. The online interface lets users create maps and reports to illustrate, analyze, and understand demography and social change. Included is the entire U.S. census history from 1790 to 2010, the American Community Survey (ACS) from 2005 to 2012, the Religious Congregations and Membership Study (RCMS) from 1980 to 2010, InfoGroup data on religious congregations in the US for 2009 and 2010, and carbon emissions data for 2002 from the Vulcan Project.