Persistent organic pollutants (POP) are not specified as a specific metric in the 2017 integrated report or the 2017 GRI Report. Under Review of Results, 1.2.3 Pollution, 2017 Integrated Report, Clariant state "Clairant implemented several measures to improve its performance regarding pollution prevention. For example, Clariant installed de-sulfurization control devices and dust collectors to reduce the emission of sulfur oxides. Air emissions and waste water quality of all sites is monitored closely. The parameters tracked for air emissions include volatile organic compounds (VOC), sulfur oxides (SOx), and nitrogen oxides (NOx)".