Smog

{
  "id": "MLC-T-CHM-010957",
  "term": "Smog",
  "field": "Chemistry",
  "definition": "A visible air pollution haze whose name blends smoke and fog. Classical London-type smog comes from coal smoke and sulfur dioxide in cold, damp air and forms a reducing mixture, while photochemical smog arises when sunlight drives reactions of nitrogen oxides and volatile organic compounds that yield ozone and other oxidants. The London smog of December 1952 is linked to several thousand deaths.",
  "subject": "Chemistry and the Environment",
  "see_also": [
    "fog",
    "photochemical smog",
    "smoke"
  ],
  "references": [
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2214 (https://doi.org/10.1351/pac199062112167)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/smog/"
}