40,41 Moreover, the emission of anions from vehicular exhaust over Amritsar, a holy city is quite significant. 36,42 The presence of excess sulphate and nitrate in fog water is linked to acidity. 43 Other than this biomass burning is a major factor that results in excess release of sulphates, nitrate, ammonium and sodium in the atmosphere. 44 3.2 Nitrate (NO 3 − ) to sulphate (SO 4 2− ) ratio in fog water Table S1 † shows the comprehensive view of the NO 3 − to SO 4 2− ratio along with the major contributing sources of the various locations conducted on a global scale.
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The role of particulate matter in reduced visibility and anionic composition of winter fog: a case study for Amritsar city.
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