These data give air pollution and related values for 41 U.S. cities and were collected from U.S. government publications. The data are means over the years 1969-1971.
- City: City
SO2: Sulfur dioxide content of air in micrograms per cubic meter
- Temperature: Average annual temperature in degrees Fahrenheit
Enterprises: Number of manufacturing enterprises employing 20 or more workers
- Population: Population size in thousands from the 1970 census
Wind speed: Average annual wind speed in miles per hour
- Rain: Average annual precipitation in inches
Rain Days: Average number of days with precipitation per year
