@CyanoticWasp You are wrong to label what I had to say an ad hominem but right to ask for supporting criticism. Even a known political propagandist may be telling the truth. In this case, the AEI book is a mixed bag. It rightly points out that air quality in the US has improved over the past 30 years, and even credits intelligent government regulation for this. But it greatly exagerates the improvement. Here’s a good for instance:
It states that from 1987–2007, average levels of carbon monoxide in the air dropped 70 percent. Air Quality in America: A Dose of Reality on Air Pollution Levels, Trends, and Health Risks by Joel M. Schwartz and Steven F. Hayward, The AEI Press, the American Enterprise Institute, 2007.
The EPA says “Carbin monoxide emissions, other than those from wildfires and prescribed burning, decreased 38 percent between 1990 and 2006.”
Source: Environmental Protection Agency, “Latest Findings on National Air Quality – Status and Trends through 2006,” available at http://www.epa.gov/air/airtrends/2007/ or http://www.epa.gov/air/airtrends/2007/report/carbonmonoxide.pdf.
So it would appear the AEI book overstates the case by nearly doubling the reported improvements. Other statistics are equally stretched to overstate the case, but the truth is our air, other than CO2 levels rising, is cleaner today than it was 30 years ago. Anyone who remembers LA smog of the past should know this.