Airborne particulate 1 Airborne particulate matters 1 Ambient particulate Matter 1 Carbon 1 Electromagnetic wave absorption 1 Elemental composition Elemental compositions 1 Factorization 1 Ion beams 1 Klang Valley 1 Kuala Lumpur [Kuala Lumpur (ADS)] 1 Kuala Lumpur [West Malaysia] 1 Landforms 1 Light absorption 1 Malaysia 1 Matrix algebra 1 Particle induced X-ray emission 1 Particles (particulate matter) 1 Particulate emissions 1 Pollution 1 Positive Matrix Factorization 1 Positive matrix factorisation 1 Urban growth 1 West Malaysia 1 atmospheric pollution 1 black carbon 1 chemical composition 1 particulate matter 1 pollutant source 1 pollutant transport 1