I want an article on the topic "smog - an alarming" for class 7"
Answers
The atmospheric hydrocarbons from human activity account for only 15% of the total, but the effect they have is great because of where they are released - in urban areas. The biggest emitter of hydrocarbons is from car engines.
As chemical reactions continue, the levels of ozone rise. Small molecules combine to form larger molecules and eventually tiny particles. These particles and the brown colour of nitrogen dioxide give the smog its characteristic look.
Smog can stay for a long time. It reduces incoming solar radiation.
There are many problems that smog cause. These include medical problems such as Asthma and eye and skin irritations. This could be a long-term effect if it’s not treated. Asthma will most likely be a long-term effect. Visibility is going to be very difficult if smog is going to be there for a few days. This means that it will be impossible for people to drive their cars. This could cause even more problems because it means that people can’t travel to work. This means that people will have loss of earnings. They won’t be able to travel to their place of work and so will have to stay at home. Other effects could be that everyday living slows down, this is because transport won’t be running, people won’t be able to go to work, this means that shops etc will not be open, this could cause people to run out of food. These are all knock on effects of smog.
There are many ways in which smog can be reduced. These solutions include using filters on chimneys so then there aren’t as many gases going into the atmosphere. People could walk or use bikes rather that use their car all of the time. This would reduce the amount of car fumes polluting the earth.
Smog is one of the major forms of air pollution. ... High temperatures stimulate the effects of smog, therefore, the highest levels of smog are on hot summer days. This means that most of the problems associated with smog occur in the summer months.Health effects vary from person to person so it a alarming to all the human and there activities.
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Answer:
Smog is a type of intense air pollution. The word "smog" was coined in the early 20th century, and is a contraction (portmanteau) of the words smoke and fog to refer to smoky fog due to its opacity, and odor.[1] The word was then intended to refer to what was sometimes known as pea soup fog, a familiar and serious problem in London from the 19th century to the mid-20th century. This kind of visible air pollution is composed of nitrogen oxides, sulphur oxides, ozone, smoke and other particulates. Man-made smog is derived from coal combustion emissions, vehicular emissions, industrial emissions, forest and agricultural fires and photochemical reactions of these emissions.
Explanation:
Smog is often categorized as being either summer smog or winter smog. Summer smog is primarily associated with the photochemical formation of ozone. During the summer season when the temperatures are warmer and there is more sunlight present, photochemical smog is the dominant type of smog formation. During the winter months when the temperatures are colder, and atmospheric inversions are common, there is an increase in coal and other fossil fuel usage to heat homes and buildings. These combustion emissions, together with the lack of pollutant dispersion under inversions, characterize winter smog formation. While photochemical smog is the main smog formation mechanism during summer months, winter smog episodes are still common. Smog formation in general relies on both primary and secondary pollutants. Primary pollutants are emitted directly from a source, such as emissions of sulfur dioxide from coal combustion. Secondary pollutants, such as ozone, are formed when primary pollutants undergo chemical reactions in the atmosphere.
Photochemical smog, as found for example in Los Angeles, is a type of air pollution derived from vehicular emission from internal combustion engines and industrial fumes. These pollutants react in the atmosphere with sunlight to form secondary pollutants that also combine with the primary emissions to form photochemical smog. In certain other cities, such as Delhi, smog severity is often aggravated by stubble burning in neighboring agricultural areas. The atmospheric pollution levels of Los Angeles, Beijing, Delhi, Lahore, Mexico City, Tehran and other cities are often increased by an inversion that traps pollution close to the ground. The developing smog is usually toxic to humans and can cause severe sickness, a shortened life span, or premature death.