Science
Smog.
Definition
Smog is a type of air pollution that forms when vehicle emissions and industrial pollutants react with sunlight. Photochemical smog contains ground-level ozone and other harmful compounds, while industrial smog results from burning fossil fuels that release sulfur dioxide and particulate matter.
Examples
Real-world.
- 1 The brownish haze over Los Angeles caused by vehicle exhaust and sunlight
- 2 London's Great Smog of 1952 caused by coal burning that killed thousands
- 3 Beijing's winter smog from coal heating and industrial emissions