Fog vs. Smog: What's the Difference?

Condensed water vapor in cloudlike masses lying close to the ground and limiting visibility.

Fog that has become mixed and polluted with smoke.

An obscuring haze, as of atmospheric dust or smoke.

A form of air pollution produced by the photochemical reaction of sunlight with hydrocarbons and nitrogen oxides that have been released into the atmosphere, especially by automotive emissions.

A mist or film clouding a surface, as of a window, lens, or mirror.

A noxious mixture of particulates and gases that is the result of urban air pollution.

A cloud of vaporized liquid, especially a chemical spray used in fighting fires.

(informal) To get a smog check; to check a vehicle or have it checked for emissions.

A state of mental vagueness or bewilderment.

Air pollution by a mixture of smoke and fog

Something that obscures or conceals; a haze

A blur on a developed photographic image.

A new growth of grass appearing on a field that has been mowed or grazed.

Tall, coarse grass left standing in fields through the winter.

To cover or envelop with fog.

To cause to be obscured; cloud.

To make vague, hazy, or confused

To obscure or dim (a photographic image).

To be covered with fog.

To be blurred, clouded, or obscured

To be dimmed or obscured. Used of a photographic image.

(uncountable) A thick cloud that forms near the ground; the obscurity of such a cloud. mist, haze.}}

(uncountable) A mist or film clouding a surface.

A state of mind characterized by lethargy and confusion.

(photography) A silver deposit or other blur on a negative or developed photographic image.

(computer graphics) Distance fog.

A new growth of grass appearing on a field that has been mowed or grazed.

Tall and decaying grass left standing after the cutting or grazing season.

(Scotland) Moss.

(intransitive) To become covered with or as if with fog.

(intransitive) To become obscured in condensation or water.

To become dim or obscure.

To make dim or obscure.

To spoil (film) via exposure to light other than in the normal process of taking a photograph.

(transitive) To cover with or as if with fog.

(transitive) To disperse insecticide into (a forest canopy) so as to collect organisms.

(transitive) To obscure in condensation or water.

(transitive) To make confusing or obscure.

To practice in a small or mean way; to pettifog.

(transitive) To pasture cattle on the fog (of), or aftergrass, of; to eat off the fog from (a field).

(intransitive) To become covered with the kind of grass called fog.

A second growth of grass; aftergrass.

Watery vapor condensed in the lower part of the atmosphere and disturbing its transparency. It differs from cloud only in being near the ground, and from mist in not approaching so nearly to fine rain. See Cloud.

A state of mental confusion.

Cloudiness or partial opacity of those parts of a developed film or a photograph which should be clear.

To pasture cattle on the fog, or aftergrass, of; to eat off the fog from.

To practice in a small or mean way; to pettifog.

To envelop, as with fog; to befog; to overcast; to darken; to obscure.

To render semiopaque or cloudy, as a negative film, by exposure to stray light, too long an exposure to the developer, etc.

To show indistinctly or become indistinct, as the picture on a negative sometimes does in the process of development.

Droplets of water vapor suspended in the air near the ground

An atmosphere in which visibility is reduced because of a cloud of some substance

Confusion characterized by lack of clarity

Make less visible or unclear;