Trends in exposure to industrial air toxins for different racial and socioeconomic groups: A spatial and temporal examination of environmental inequality in the U.S. from 1995 to 2004

• Nationally, exposure to industrial toxins is decreasing everywhere.
• The Black/White gap in exposure has remained relatively consistent over time.
• Middle-class African-Americans are exposed to more toxins than lower-class whites.
• The amount of toxins is decreasing in central cities across all EPA regions.
• The toxicity of toxins is not decreasing as clearly in central cities.