Halons used in fire extinguishers contain bromine atoms. The presence of bromine atoms in halons gives them their fire suppression capabilities. Bromine is highly reactive and can disrupt the chain reactions that occur during combustion, effectively suppressing the fire.

Halons are used in fire extinguishers which contain Bromine atoms. Halons, which contain bromine atoms, have higher ODP values because bromine is more reactive than chlorine, which is present in CFCs.

CFCs have long atmospheric lifetimes due to their stability and low reactivity in the lower atmosphere (troposphere) raging from decades to centuries. They are relatively inert and do not readily undergo chemical reactions that break them down. Once reaches Stratosphere, it can be broken down by high-energy UV radiation from the Sun releasing chlorine atoms resulting in the depletion of the Ozone layer.

Methyl bromide (CH3Br) is an agricultural fumigant that has a significant ozone depletion potential (ODP). It is commonly used for soil fumigation to control pests, pathogens, and weeds in agricultural practices. Methyl bromide is an ozone-depleting substance primarily due to the bromine atoms it contains.

The “ozone hole” primarily exists over the continent of Antarctica. The unique atmospheric and meteorological conditions over Antarctica, including the presence of polar stratospheric clouds and extremely low temperatures, contribute to the formation of the ozone hole.

Ozone-depleting substances are released into the atmosphere, once they reach the stratosphere, these substances are broken down by high-energy UV radiation, releasing chlorine and bromine atoms. The chlorine and bromine atoms act as catalysts in ozone depletion reactions.

Ozone present in Stratosphere shields harmful UV light from reaching Earth’s surface. However, Ozone is formed in Troposphere by chemical interactions between Nitrous Oxide and Volatile Organic Compounds in the presence of Sunlight. These reactions occur in the presence of pollutants emitted by human activities such as industrial processes, vehicle emissions, and certain natural sources

ODP is a measure of a substance’s potential to deplete the ozone layer when compared to the reference substance, chlorofluorocarbon-11 (CFC-11), which has an ODP of 1.0.

HCFCs have ODP values ranging from 0.01 to 0.1. HFCs have an ODP of zero. CFCs have relatively high ODP values, having ODPs of 1.0

R-410A is a hydrofluorocarbon (HFC) refrigerant commonly used in air conditioning and heat pump systems. It is an alternative to HCFC-22 (R-22), which is being phased out due to its ozone-depleting potential. R-410A has become widely used in residential and commercial cooling applications.

The ozone depletion potential (ODP) of carbon tetrachloride (CCl4) is 1.1. This means that carbon tetrachloride has a higher ozone depletion potential than the reference substance, chlorofluorocarbon-11 (CFC-11), which has an ODP of 1.0.

HFC (R-410A) has a GWP of 2,088 over a 100-year time horizon. This means that over a 100-year period, R-410A has a warming potential 2,088 times greater than an equivalent mass of carbon dioxide. Other HFCs also have high GWP values, typically in the range of several hundred to several thousand.