Trump's NAAQS Overhaul Prompts Questions On Scope Of CASAC's Input

President Donald Trump's directive for EPA to overhaul and streamline the national ambient air quality standards (NAAQS) review process is prompting questions over how it might affect the Clean Air Scientific Advisory Committee's (CASAC) input on NAAQS, including new consideration of costs and possibly undermining some air science. CASAC is an independent group of experts that advises EPA on reviews of its six NAAQS for ozone, particulate matter and other criteria pollutants. The group assesses the latest science on criteria...