SEARCH Articles Figures Tables Analysis of PCDDs/PCDFs Atmospheric Chemistry of PCBs, PCDDs and PCDFs Chemical waste, PCDDs/PCDFs Human Exposures to PCDDs and PCDFs PCDD PCDD/PCDFs PCDDs PCDDs/PCDFs PCDDs/PCDFs occurrence PCDF PCDFs Polychlorinated Dibenzodioxins (PCDD) and Dibenzofurans (PCDF) Polychlorinated dibenzodioxins (PCDDs) and dibenzofurans (PCDFs) Toxicity PCDDs and PCDFs Transformations of Gas-phase PCBs, PCDDs and PCDFs Tropospheric Lifetimes of PCBs, PCDDs and PCDFs