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WOOCS v.1.3.9.2

  • Solutions
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      • Rental Monitor
      • Pocket CO2 Monitor
      • Pocket PM2.5 Monitor
      • Smart PM Monitor
      • Sensible Air Monitor
      • Sensible+ Air Monitor
      • SQUAIR Air Monitor
      • Ambient Air Monitor (CAAQMS)
    • Air Quality Sensors
      • PM Sensors
        • Indoor PM
        • Outdoor PM
      • Gas Sensors
        • CO Sensor
        • CO2 Sensor
        • SO2 Sensor
        • NO2 Sensor
        • Ozone Sensor
        • Ethanol Sensor
        • Ammonia Sensor
        • Chlorine Sensor
        • H2S Sensor
    • Air Quality PCBs
    • Air Purifier
      • Fresh Air Machine
      • Outdoor Air Purifier
      • Room Air Purifier
      • Air Sanitizer
    • Pollution Mask
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      • Adult-Kid Mask (N95)
      • 2nd Gen Mask (N95)
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      • Car Cabin Filter
      • Air Purifier Filter
      • Room AC Filter
      • 2nd Gen Mask Filter
      • Motion Mask Filter
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    • Outdoor Air Solution
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    • Aided TATA Steel Plant in Hyperlocal Air Monitoring
    • Assisted Pacific Golf Estate
    • Helped CII to Monitor Pollution By Stubble Burning
    • Aided Ola & Microsoft
    • At Mahindra to Measure PM2.5
  • Know What
    • What is Air Pollution?
    • What is PM2.5 | PM10?
    • What is Ozone (O3)?
    • What is Humidity?
    • What is Radon (Rn)?
    • What is Ammonia (NH3)?
    • What is Pollen?
    • What is CO?
    • What is CO2?
    • What is SO2?
    • What is NO2?
      • What is H2S?
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    • What is Noise?
    • What is Mold?
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The Good, the Bad and the Ozone! Looking at the harmful aspects of Ozone in ambient air.

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Sep282020
Air PollutionAir QualityOzone PollutionOzone can be good or bad for us depending upon where it is found

As per the Center for Disease Control and Prevention (CDC), ozone is one of the six most common air pollutants. How is it a pollutant? Isn’t ozone our saviour? Is ozone harmful if found in the ambient air? Wait, is ozone good, or is it not? Don’t scratch your head. Read more to find out.

What exactly is ozone, you may think? Well, simply put, ozone is nothing but a form of oxygen. Three atoms of oxygen bind together to form gaseous ozone. Now whether it is good or bad depends on where it is found. Yes, the location determines the apparent ‘behaviour’ of ozone.

Sitting between about 10 and 50 km of altitude is the natural ozone. It is also referred to as the stratospheric ozone, and it makes up about 99% of the total ozone found on the Earth. Atmospheric oxygen – O2 – at this altitude, disintegrate into oxygen atoms due to the action of sunlight. These single atoms may either react with each other to re-form O2 or combine with O2 to form ozone (O3). This stratospheric ozone makes up the protective ozone layer that filters out and protects all the living forms from the harmful ultraviolet radiation of the sun. Without ozone, the intense solar UV radiation would sterilize the Earth’s surface. This utility makes the stratospheric ozone heroic. The ‘good-natured’ ozone gets jeopardized when it reacts with molecules containing nitrogen, hydrogen, chlorine, or bromine. Some of these occur naturally, while others have been created by us.

 

But when does this good become evil

The ozone layer is sure a hero, but ozone gas in the air around us? Well, it is toxic!

But when does this good become harmful?

The ozone is deemed bad when its concentration in the lower atmosphere (troposphere) increases. Direct exposure of the living with the ground-level ozone (GLO) renders this hero villainous. There is no source on the surface of the Earth that directly emits ozone, which means that it does not occur naturally. It is formed as the result of a photochemical reaction between oxides of nitrogen and volatile organic compounds (VOCs). The pollutants emitted by vehicles, power plants, industrial boilers and precipitators, refineries, chemical industries, and others react in the presence of sunlight to form ozone. This facilitates a hike in ozone levels on hot sunny days in an urban environment. But even rural areas can experience the increase because it can travel long distances. A powerful oxidant, it is detrimental to plants as well as animals (including humans).

How is the presence of ozone in ambient air harmful to ecology?

Impact of ozone pollution on ecosystem

The ecosystem suffers when the concentration of ozone in the ambient air increases.

 

High levels of ozone affect sensitive vegetation and ecosystems. It inhibits the opening of stomatal pores on the leaves of the plant. It also interferes with photosynthesis as it limits the amount of carbon dioxide processed and converted to oxygen. Ozone also reduces the growth and survivability of the seedlings and increases the susceptibility to diseases and pests. It reduces the agricultural crop and commercial forest yields. Dicot species like soybean, cotton, and peanut, etc. are more vulnerable to yield loss than monocots (such as sorghum, corn, and wheat).

Why should we be concerned about excess ozone in ambient air?

Ozone pollution is harmful to human health

Ozone pollution leads to several ailments, both acute and chronic

 

The effect of ozone can be observed on our health. It may also affect us without any noticeable signs or symptoms. Medically speaking, people with specific genetic characteristics and those with reduced intake of nutrients Vitamin C and E are at greater risk from ozone exposure. Ozone can cause morphological, functional, immunological, and biochemical alterations. Ozone Pollution can be observed in humans through the following visible signs, ranging from moderate to severe in terms of impact depending upon the duration of exposure –

  • Chest pain
  • Cough and throat irritation
  • Inflammation in airway
  • Asthma and bronchitis
  • Emphysema
  • Reduced lung function

Ozone Pollution is more dangerous for those who are already suffering from these conditions because ozone amplifies the severity. Chronic exposure can also lead to premature fatality in people with respiratory or heart diseases. Studies suggest that prenatal or childhood exposure to ozone enhances the chance of autism by ten times in at-risk populations. Due to its high reactivity and unstable nature, it can even cause damage at the genetic level by altering our DNA. So yes, all this should be enough to alarm us about the bad ozone.

Conclusion

Central Pollution Control Board (CPCB) has set standards to regulate the quality of ambient air. As per the National Ambient Air Quality Standards (NAAQS) of India, the limit of ozone in the ambient air for an 8-hours average is set as 100 micrograms per cubic meter.

Thinking how can we check something you can’t see? If you want to check your ambient air for the presence of ozone beyond the stipulated limit, click here.

By Poorna Khanna28/09/2020
Tags: air pollutionAir Qualityambient airGround level ozoneHarmful effects of ozoneHuman HealthOzoneozone in ambient airOzone Pollutionstratospheric ozoneToxic airTropospheric Ozone
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Author: Poorna Khanna

Poorna Khanna is an environmentalist by passion and profession. She has a master's degree in Environment Management and wants to change the world for the better, one step at a time. A firm believer in the power of nature, she hopes that with increased awareness, we will be able to create a better future for our children.

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