smog

/smɔg/

Thân thiện

A thick layer of smog hangs over the city skyline.

Definition

1. Noun:
   • Air pollution consisting of a mixture of smoke and fog: A type of dense, dirty, and often harmful air pollution that is common in urban and industrial areas, created when smoke and other pollutants combine with fog.

Usage

• As a subject: "Smog" is often used to describe a visible, hazardous atmospheric condition.
• As an object: It is commonly discussed in contexts of environmental science, public health, and weather reports.

Examples

• Noun:
  • The city was covered in a thick blanket of smog.
  • Health officials issued a warning due to dangerous levels of smog.
  • Industrial emissions are a major contributor to smog formation.

Advanced Usage

• "Photochemical smog": A specific type of smog formed by the action of sunlight on pollutants like nitrogen oxides and volatile organic compounds, common in sunny cities.
  • Los Angeles is famous for its photochemical smog.
• "Smog alert": An official warning issued when smog levels are dangerously high.
  • A smog alert was declared, advising people with respiratory problems to stay indoors.

Variants and Related Words

• Smoggy (adj): Describing an atmosphere filled with or characterized by smog.
  • The view was terrible on the smoggy day.

Synonyms

• Haze: A slight obscuration of the lower atmosphere, typically caused by fine suspended particles. (Less dense and specific than smog).
• Pollution: The presence in or introduction into the environment of a substance with harmful effects. (A broader, more general term).

Idioms

• "Choking on smog": Used figuratively to describe severe air pollution and its effects.
  • The metropolis is literally choking on smog.

Học thuật

Noun

1. air pollution by a mixture of smoke and fog

Từ đồng nghĩa

• smogginess