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Health effects. Smog is a serious problem in many cities and continues to harm human health. Ground-level ozone, sulphur dioxide, nitrogen dioxide and carbon monoxide are especially harmful for senior citizens, children, and people with heart and lung conditions such as emphysema, bronchitis, and asthma.

Smog is a kind of air pollution, originally named for the mixture of smoke and fog in the air. Classic smog results from large amounts of coal burning in an area and is caused by a mixture of smoke and sulfur dioxide. In the 1950s a new type of smog, known as Photochemical Smog, was first described.

Smog is a yellowish or blackish fog formed mainly by a mixture of pollutants in the atmosphere which consists of fine particles and ground level ozone. Smog which occurs mainly because of air pollution, can also be defined as a mixture of various gases with dust and water vapor. Smog also refers to hazy air that makes breathing difficult.

A form of air pollution produced by the reaction of sunlight with hydrocarbons, nitrogen compounds, and other gases primarily released in automobile exhaust. Smog is common in large urban areas, especially during hot, sunny weather, where it appears as a brownish haze that can irritate the eyes and lungs.

Smog can cause or aggravate health problems such as asthma, emphysema, chronic bronchitis and other respiratory problems as well as eye irritation and reduced resistance to colds and lung infections. The ozone in smog also inhibits plant growth and can cause widespread damage to crops and forests.

(smŏg) 1. A form of air pollution produced when sunlight reacts with hydrocarbons and nitrogen compounds released into the atmosphere, especially from automobile exhaust. Smog is common in many large cities, especially during hot, sunny weather. It appears as a brownish haze and can irritate the eyes and lungs.

Smog is air pollution that reduces visibility. The term "smog" was first used in the early 1900s to describe a mix of smoke and fog. The smoke usually came from burning coal. Smog was common in industrial areas, and remains a familiar sight in cities today. Today, most of the smog we see is photochemical smog.

What Is Smog >> Tokyo Smog | Romain Guy | Flickr

What Is Smog >> Tokyo Smog | Romain Guy | Flickr

What Is Smog >> Smog-eating facades. | smart magazine

What Is Smog >> Smog-eating facades. | smart magazine

What Is Smog >> Shanghai People Square - Smog | Taken three days apart... | Flickr

What Is Smog >> Shanghai People Square - Smog | Taken three days apart... | Flickr

What Is Smog >> Index of /environment/smog/Feedbacks_files

What Is Smog >> Index of /environment/smog/Feedbacks_files

What Is Smog >> Smog 20clipart | Clipart Panda - Free Clipart Images

What Is Smog >> Smog 20clipart | Clipart Panda - Free Clipart Images

What Is Smog >> SMOG Resto Cafe'

What Is Smog >> SMOG Resto Cafe'

What Is Smog >> Earth’s Recent History Key to Predicting Global Temperatures | NASA

What Is Smog >> Earth’s Recent History Key to Predicting Global Temperatures | NASA