expand_less This metric is asking for the number of metric tonnes of particulate matter (PM) produced by the company:For WikiRate researchers:Companies who align reports to GRI’s Sustainability Reporting Standards often include a GRI Content Index or Annex where GRI disclosures, with GRI codes, are listed.Use the GRI Index, CTRL F, Command F or search button on source review to search for this index and metrics within the reportUse G4 codes, G3 codes or keywords to quickly find values, keeping in mind that some companies report on the metric using different terms, e.g. G4-EN21 or EN21, particulate matter or PMAlways check the metric question and methodology for the unit of measure or currency - researchers may need to carry out [[Conversions_&_Calculations|calculations or conversions]] before entering the final metric valueAdd [[Adding comments|comments]] documenting exactly where within the source you found the information (page number) and include details of simple or complex [[Conversions_&_Calculations|calculations or conversions]] made to determine the metric valueIf you are unable to locate a metric value in a source you can search for additional sources where the data is available and [[adding_new_sources|add a new source]][[Adding & Tagging New Sources|add a new source]]Further guidance on how to research values for GRI-based metrics is available [[Researching_GRI_Metrics|here]], including detailed guidance on adding, editing and [[checking metric values]].Global Reporting Initiative compliance guidance for companies:To calculate particulate matter (PM) emissions - [[https://g4.globalreporting.org/specific-standard-disclosures/environmental/emissions/Pages/G4-EN21.aspx|G4-EN21-a]]:​Identify significant particulate matter (PM) emitted by the organization and sources of significant air emissions release to the environment.Calculate the amount of particulate matter emissions released to the environment.Reporting on this Indicator should include the following contextual information as a comment to the metric value:G4-EN21-b: Standards, methodologies, and assumptions used.G4-EN21-c: Source of the emission factors used.