Photochemical Smog

{
  "id": "MLC-T-ENV-020918",
  "term": "Photochemical Smog",
  "field": "Environment",
  "definition": "1. Air pollution caused by chemical reactions of various pollutants emitted from different sources.\n\n2. Air pollution containing ozone and other reactive chemical compounds formed by the reaction of nitrogen oxides and hydrocarbons in the presence of sunlight.\n\n3. Originally smog meant a mixture of smoke and fog. Now, it means air that has restricted visibility due to pollution or pollution formed in the presence of sunlight--photochemical smog.\n\n4. A commonly used term for pollution caused by complex chemical reactions involving nitrogen oxides and hydrocarbons in the presence of sunlight. Ozone is a key component of smog. Smog-forming chemicals come from a wide variety of combustion sources and are also found in products such as paints and solvents. Smog can harm human health, damage the environment, and cause poor visibility. Major smog occurrences are often linked to heavy motor vehicle traffic.",
  "subject": "General environmental",
  "references": [
    "Terms of Environment",
    "NOAA National Weather Service Glossary",
    "Mobile Source Emissions Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/photochemical-smog/"
}