Selected National Air Pollutant Emissions: 1970 to 2005 (In thousands of tons, except as indicated.) The amount of various pollutants emitted into the air has fallen significantly between 1970 and 2005. Pollutant 1970 (unless indicated) 2005 PM-10 12,184 2,258 PM-10,...
With air pollution, averages don’t tell us a whole lot. We need to look at specific locations to see if air quality is really improving. Let’s examine Chicago (Cook County). As the center of a big ‘ol historical industrial area, you’d expect...
National Ambient Air Pollutant Concentrations by Type of Pollutant: 1990 and 2006 Overall, air quality has improved somewhat over the last 15 years. Other than Ozone levels, all major pollutants fall significantly below national air quality standards. Pollutant...
Educational Attainment of 25 to 34 year olds: 2007 Degree attainment among today’s 25 to 34 year-olds is fairly fluid. 25 to 34 years old % Population 39.8 million Not a high school graduate 12.9% High school graduate 28.6% Some college, but no degree 18.1%...
College Enrollment Rates by Gender: 1970 and 2006 (In millions) Year Total Student Population Female Male 1970 7.4 4.4 3.0 1980 11.4 5.4 6.0 2006 17.2 7.5 9.7...
