In a narrow 5-4 decision in 2007, the US Supreme Court, authorized the EPA to consider the greenhouse gas CO2 as a 'pollutant' under the terms of the Clean Air Act -- provided EPA could demonstrate that CO2 posed a threat to human health and welfare.......... EPA claims it met all IQA [Information Quality Act] standards because the TSD [Technical Support Document], far from being a "highly influential scientific assessment," is not a "scientific assessment" at all. According to EPA, the TSD did not involve any weighing of data, information, or studies. Rather, the TSD simply summarizes assessments of other...