How and where is bad ozone created?
Ground-level or “bad” ozone is not emitted directly into the air, but is created by chemical reactions between oxides of nitrogen (NOx) and volatile organic compounds (VOC) in the presence of sunlight.
What is a bad ozone?
The “bad” ozone or ground-level ozone is sourced from human activity. This harmful air pollutant affects people, the environment and is the main ingredient in “smog”.
What is the difference between bad and good ozone?
"Bad" ozone is found in the troposphere, the layer nearest the ground. Tropospheric ozone is a harmful pollutant which forms when sunlight alters various chemicals emitted by humans. "Good" ozone forms in the stratosphere, the next higher layer where some jet planes fly.
What is ozone and why is it bad?
Ozone (O3) is a gas molecule composed of three oxygen atoms. Often called "smog," ozone is harmful to breathe. Ozone aggressively attacks lung tissue by reacting chemically with it. When ozone is present, there are other harmful pollutants created by the same processes that make ozone.
How is a good ozone formed?
Ozone is formed when heat and sunlight cause chemical reactions between oxides of nitrogen (NOX ) and Volatile Organic Compounds (VOC), which are also known as Hydrocarbons. This reaction can occur both near the ground and high in the atmosphere.
What are some sources of bad ozone?
Ground-level ozone comes from pollution emitted from cars, power plants, industrial boilers, refineries, and chemical plants. Ozone pollution can even come from paints, cleaners, solvents, and motorized lawn equipment.
Where does good ozone occur?
Ozone occurs naturally at low concentrations throughout the Earth's atmosphere. In the stratosphere, which extends from about 10 to 50 km above the Earth's surface, ozone is 'good' as it protects life on Earth from the sun's ultraviolet rays.
What is a good ozone level?
0-50 Good (0-50) It's a great day to be active outside. Moderate (51-100) Some people who may be un- usually sensitive to ozone. Unusually sensitive people: Consider reducing prolonged or heavy outdoor exertion. Watch for symptoms such as coughing or shortness of breath.
What is the difference between good and bad ozone Class 10?
When present on the Earth's surface, ozone is a very poisonous gas. Hence it is called bad ozone. When present in the stratosphere, ozone is very protective as it does not allow harmful ultraviolet radiations to enter the Earth's atmosphere. Hence it is called good ozone.
Why is high ozone bad?
Ozone can cause the muscles in the airways to constrict, trapping air in the alveoli. This leads to wheezing and shortness of breath. Depending on the level of exposure, ozone can: Cause coughing and sore or scratchy throat.
Why tropospheric ozone is bad ozone?
In the troposphere, near the Earth's surface, human activities lead to ozone concentrations several times higher than the natural background level. Too much of this ground-level ozone is 'bad' as it is harmful to breathe and also damages vegetation.
How ozone is formed?
Ozone is formed when heat and sunlight cause chemical reactions between oxides of nitrogen (NOX ) and Volatile Organic Compounds (VOC), which are also known as Hydrocarbons. This reaction can occur both near the ground and high in the atmosphere.
How ozone hole is formed?
Reasons for the ozone hole The ozone hole has developed because people have polluted the atmosphere with chemicals containing chlorine and bromine. The primary chemicals involved are chlorofluorocarbons (CFCs for short), halons, and carbon tetrachloride.
Where is good ozone found?
In the stratosphere, which extends from about 10 to 50 km above the Earth's surface, ozone is 'good' as it protects life on Earth from the sun's ultraviolet rays.
How is ozone formed?
Ozone is formed when heat and sunlight cause chemical reactions between oxides of nitrogen (NOX ) and Volatile Organic Compounds (VOC), which are also known as Hydrocarbons. This reaction can occur both near the ground and high in the atmosphere.
How ozone is formed in stratosphere?
Stratospheric ozone is formed naturally through the interaction of solar ultraviolet (UV) radiation with molecular oxygen (O2). The "ozone layer," approximately 6 through 30 miles above the Earth's surface, reduces the amount of harmful UV radiation reaching the Earth's surface.
How is ozone both beneficial and damaging How is ozone formed at the higher levels of atmosphere?
Solution : Ozone is present at higher levels in the atmosphere. It is beneficial as, it shields the earth. s surface from harmful ultraviolet (UV) radiations from the Sun. These radiations are extremely harmful to organisms as it causes skin cancer in human beings.
How ozone is formed in the lower atmosphere?
Ozone is formed in the lower atmosphere primarily by nitrogen oxides (NOx) reacting with volatile organic compounds (VOCs) on warm, sunny days. Nitrogen oxides are released into the atmosphere as a by-product of any combustion. For example, nitrogen oxides are released from the burning of vegetation during a fire.
How is ozone formed in the troposphere?
Tropospheric ozone is formed by the interaction of sunlight, particularly ultraviolet light, with hydrocarbons and nitrogen oxides, which are emitted by automobile tailpipes and smokestacks. In urban areas, high ozone levels usually occur during warm summer months.
How is ozone layer formed what is the reason for the depletion of this layer?
Chlorofluorocarbons or CFCs are the main cause of ozone layer depletion. These are released by solvents, spray aerosols, refrigerators, air-conditioners, etc. The molecules of chlorofluorocarbons in the stratosphere are broken down by ultraviolet radiations and release chlorine atoms.
What is ozone formation and depletion?
Ozone can be destroyed more quickly than it is naturally created. Some compounds release chlorine or bromine when they are exposed to intense UV light in the stratosphere. These compounds contribute to ozone depletion, and are called ozone-depleting substances ( ODS.
How does ozone form in the atmosphere?
Ozone is formed in the atmosphere through chemical reactions between pollutants emitted from vehicles, factories and other industrial sources, fossil fuels, combustion, consumer products, evaporation of paints, and many other sources.
How did the ozone layer form?
Stratospheric ozone is formed naturally through the interaction of solar ultraviolet (UV) radiation with molecular oxygen (O2). The "ozone layer," approximately 6 through 30 miles above the Earth's surface, reduces the amount of harmful UV radiation reaching the Earth's surface.
How is ozone formed at higher level?
Ozone at the higher levels of the atmosphere is a product of UV radiation acting on oxygen (O2) molecule. The higher energy UV radiations split apart some molecular oxygen (O2) into free oxygen (O) atoms. These atoms then combine with the molecular oxygen to form ozone as shown.
Why is ozone good in the stratosphere and bad in the troposphere?
Stratospheric ozone is “good” because it protects living things from ultraviolet radiation from the sun. Ground-level ozone, the topic of this website, is “bad” because it can trigger a variety of health problems, particularly for children, the elderly, and people of all ages who have lung diseases such as asthma.
How ozone is formed at higher level?
Stratospheric ozone is formed naturally through the interaction of solar ultraviolet (UV) radiation with molecular oxygen (O2). The "ozone layer," approximately 6 through 30 miles above the Earth's surface, reduces the amount of harmful UV radiation reaching the Earth's surface.
How is ozone formed in the troposphere and the stratosphere and how are these processes different?
In the strat- osphere, the process begins with an oxygen molecule (O2 ) being broken apart by ultraviolet radiation from the Sun. In the lower atmosphere (troposphere), ozone is formed in a different set of chemical reactions involving hydrocarbons and nitrogen-containing gases.
How is ozone is formed?
Ozone is formed when heat and sunlight cause chemical reactions between oxides of nitrogen (NOX ) and Volatile Organic Compounds (VOC), which are also known as Hydrocarbons. This reaction can occur both near the ground and high in the atmosphere.
What is ozone How and where is it formed in the atmosphere explain how does it affect ecosystem?
ozone layer is a gas which protect them to harmful rays coming from the sunlight. it is formed in higher of atmosphere and when it's break down make oxygen. when ozone layer is not protect them from harmful radiation of sunlight it can get harmful to ecosystem and get disease like cancer.
Why is bad ozone worse in the summer time?
The combination of more direct sunlight and longer daylight hours creates the summer ozone season. Since more people travel in the summer, there is also more vehicle exhaust in the air. As a result, the compounds that react to form ozone become more available.