clean air act. the agency sets the standard for what is considered good air and bad. but even that basic measure is now under threat. >> they've gotten rid of entirely the clean air science advisory committee that is dealing with particulate matter. >> in fact, the total number of people reviewing air quality standards for the entire country went from dozens to just seven. >> if you don't like the message, kill the messenger. in this case, they don't like the message from scientists so they disbanded the committee. >> that formal sub committee review process that took and literally months and years -- >> are you wiping out all the sub committee? >> yes. for the ozone and pm and then we'll see how that goes. >> the epa administrator calls that efficiency. >> the agency has never met the five-year deadline under the clean air act. we tried to reform the process.