The overall methodology selected by the “EX~TREMIS” project is shown diagrammatically and can be illustrated as follows:

“EX~TREMIS” covers the following pollutants: carbon dioxide (CO2), nitrogen oxide (NOx), sulphur dioxide (SO2), carbon monoxide (CO), volatile organic compounds (VOC), methane CH4, non-methane volatile organic compounds (NMVOC) and particulate matter (PM). It consists of two separate database domains:
Datasets are released in MS Excel Pivot tables together with metadata notes and methodological manuals.