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 Class 9 short answer?
What is smog? Smog is a kind of air pollution that is produced by the photochemical reaction of sunlight with nitrogen oxides and hydrocarbons which have been released into the atmosphere, specifically by automotive emissions.
What is smog very short answer?
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.
How do you explain smog to a child?
Smog is a combination of the words smoke and fog. It’s formed when gases and fine particulate matter react in the presence of sunlight . Smog is made up of a lot of pollutants. Most harmful to our health and to the natural environment are those that come from cars, trucks and machines that run on fuels like gasoline.
What is smog and its effects?
Smog can irritate your eyes, nose and throat . Or it can worsen existing heart and lung problems or perhaps cause lung cancer with regular long-term exposure. It also results in early death. Studies on ozone show that once it gets into your lungs, it can continue to cause damage even when you feel fine.
Does smog go away?
Smog won’t go away until a storm “clears” the air .
What is smog and its types?
Smog, community-wide polluted air. Its composition is variable. The term is derived from the words smoke and fog, but it is commonly used to describe the pall of automotive or industrial origin that lies over many cities. ... At least two distinct types of smog are recognized: sulfurous smog and photochemical smog .
What are the 3 types of smog?
At least two distinct types of smog are recognized: 1) Sulfurous smog (or ‘London-type’ smog); 2) Photochemical smog (‘Los Angeles-type’ smog).
What is smog Why is it harmful Class 9?
The harmful effects of smog are: Ozone, peroxyacyl nitrates and PAN occur in the eyes and into the respiratory system. Smog has oxidizing nature . Oxygen contains metals like nitrogen dioxide and ozone causing corrosion of metals, stone, rubber and painted surfaces.
Which city is the most polluted on earth right now?
| Rank City 2020 AVG | 1 Hotan, China 110.2 | 2 Ghaziabad, India 106.6 | 3 Bulandshahr, India 98.4 | 4 Bisrakh Jalalpur, India 96 |
|---|
How can smog affect humans?
When inhaled, smog irritates our airways , increasing our risk of serious heart and lung diseases. These health risks are why many cities monitor smog levels. On a high ozone-alert day, for example, your eyes and throat may burn, and you may cough and wheeze.
Which of the following disease is caused by smog?
Ambient air pollution accounts for an estimated 4.2 million deaths per year due to stroke , heart disease, lung cancer and chronic respiratory diseases.
How can you tell if the air is clean or dirty?
On a clear breezy day, the air smells fresh and clean. Clean air is air that has no harmful levels of pollutants (dirt and chemicals) in it. Clean air is good for people to breathe . On a hot day with no wind, the air can feel heavy and have a bad smell.
How can you protect yourself from smog?
- Be aware. ...
- Limit your exposure. ...
- Avoid using gas-powered engines, pesticides, and oil-based paints. ...
- Stay hydrated. ...
- Consider exercising indoors in a smoke-free, air-conditioned environment. ...
- Drive less. ...
- Protect those at higher risk of health problems.
What type of smog is harmful?
Smog is a serious problem in many cities and continues to harm human health. Ground-level ozone, sulfur 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.
How does smog occur?
Photochemical smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere . Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. ... When sunlight hits these chemicals, they form airborne particles and ground-level ozone—or smog.
