<p>BAAQMD is developing updated thresholds of significance and associated guidelines for assessing air quality impacts, including greenhouse gases (GHGs) under California Environmental Quality Act (CEQA). This project includes new approaches and information with respect to construction- and operational-related emissions of criteria air pollutants, toxic air contaminants, and odors. In addition, this work entails the development of numerical thresholds for both plan- and project-level GHG emissions, which are substantiated in the evidence presented and supported by the California Attorney General&rsquo;s office. These thresholds are the first of their kind and lead the way by providing the methodology for agencies not only in California, but across the country to develop geographic specific limitations on GHGs in response of legislative mandates.</p>