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An air quality index (AQI) is an indicator developed by government agencies [1] to communicate to the public how polluted the air currently is or how polluted it is forecast to become.
The air quality in Malaysia is reported as the API (Air Pollutant Index) or in Malay as IPU (Indeks Pencemaran Udara). Four of the index's pollutant components (i.e., carbon monoxide, ozone, nitrogen dioxide and sulfur dioxide) are reported in ppmv but PM 2.5 particulate matter is reported in μg/m 3.
For health reasons it is crucial to breathe clean air, free from chemicals and toxicants as much as possible. It is estimated that humans spend approximately 90% of their lifetime indoors [8] and that indoor air pollution in some places can be much worse than that of the ambient air.
Depok (Sundanese: ᮓᮨᮕᮧᮊ᮪) is a landlocked city in West Java province. It is located directly south of Jakarta, it is the third largest urban centre in the Greater Jakarta metropolitan area after Jakarta and Bekasi and it has an area of 199.91 km 2.
Sukmajaya is a town and an administrative district (kecamatan) within the city of Depok, in the province of West Java, Indonesia, within the Jakarta metropolitan area. It covers an area of 17.37 km 2 and had a population of 232,308 at the 2010 Census [2] and 252,500 at the 2020 Census; [3] the official estimate as at mid 2023 is 256,060. [4]
Roughness progression for a road in Texas, US. Blue dots show the times of maintenance. The international roughness index (IRI) is the roughness index most commonly obtained from measured longitudinal road profiles.