Ozone Layer

Chlorofluorocarbons (CFCs) are non-reactive, non-flammable, non-toxic organic molecules. They are therefore used in refrigerators and air conditioners, in the production of plastic foam, and by the electronic industry for cleaning computer parts. The most common Chlorofluorocarbons (CFCs) are CFC-11, CFC-12, CFC-113, CFC-114, and CFC-115.

CFCs transport agents that continuously generate chlorine radicals into the stratosphere and damage the ozone layer. One free Chlorine atom from a CFC molecule can do much damage, destroying ozone molecules for a long time. CFCs have a lifetime in the atmosphere of about 20 to 100 years.

The Montreal Protocol, signed in 1987, is a global agreement to protect the stratospheric ozone layer by eliminating the production and consumption of ODSs like chlorofluorocarbons (CFCs). The worldwide production of CFCs has been prohibited since 2010. In 2016, Parties to the Montreal Protocol adopted the Kigali Amendment to phase down the production and consumption of hydrofluorocarbons (HFCs) worldwide.

Chlorofluorocarbons (CFCs) are non-reactive, non-flammable, non-toxic organic molecules. They are therefore used in refrigerators and air conditioners, in the production of plastic foam, and by the electronic industry for cleaning computer parts. The most common Chlorofluorocarbons (CFCs) are CFC-11, CFC-12, CFC-113, CFC-114, and CFC-115.

CFCs transport agents that continuously generate chlorine radicals into the stratosphere and damage the ozone layer. One free Chlorine atom from a CFC molecule can do much damage, destroying ozone molecules for a long time. CFCs have a lifetime in the atmosphere of about 20 to 100 years.

The Montreal Protocol, signed in 1987, is a global agreement to protect the stratospheric ozone layer by eliminating the production and consumption of ODSs like chlorofluorocarbons (CFCs). The worldwide production of CFCs has been prohibited since 2010. In 2016, Parties to the Montreal Protocol adopted the Kigali Amendment to phase down the production and consumption of hydrofluorocarbons (HFCs) worldwide.

Chlorofluorocarbons (CFCs) are non-reactive, non-flammable, non-toxic organic molecules. They are therefore used in refrigerators and air conditioners, in the production of plastic foam, and by the electronic industry for cleaning computer parts. The most common Chlorofluorocarbons (CFCs) are CFC-11, CFC-12, CFC-113, CFC-114, and CFC-115.

CFCs transport agents that continuously generate chlorine radicals into the stratosphere and damage the ozone layer. One free Chlorine atom from a CFC molecule can do much damage, destroying ozone molecules for a long time. CFCs have a lifetime in the atmosphere of about 20 to 100 years.

The Montreal Protocol, signed in 1987, is a global agreement to protect the stratospheric ozone layer by eliminating the production and consumption of ODSs like chlorofluorocarbons (CFCs). The worldwide production of CFCs has been prohibited since 2010. In 2016, Parties to the Montreal Protocol adopted the Kigali Amendment to phase down the production and consumption of hydrofluorocarbons (HFCs) worldwide.

Chlorofluorocarbons (CFCs) are non-reactive, non-flammable, non-toxic organic molecules. They are therefore used in refrigerators and air conditioners, in the production of plastic foam, and by the electronic industry for cleaning computer parts. The most common Chlorofluorocarbons (CFCs) are CFC-11, CFC-12, CFC-113, CFC-114, and CFC-115.

CFCs transport agents that continuously generate chlorine radicals into the stratosphere and damage the ozone layer. One free Chlorine atom from a CFC molecule can do much damage, destroying ozone molecules for a long time. CFCs have a lifetime in the atmosphere of about 20 to 100 years.

The Montreal Protocol, signed in 1987, is a global agreement to protect the stratospheric ozone layer by eliminating the production and consumption of ODSs like chlorofluorocarbons (CFCs). The worldwide production of CFCs has been prohibited since 2010. In 2016, Parties to the Montreal Protocol adopted the Kigali Amendment to phase down the production and consumption of hydrofluorocarbons (HFCs) worldwide.

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). ODS that release chlorine include chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), carbon tetrachloride, and methyl chloroform. ODS that release bromine include halons and methyl bromide.

Although ODS are emitted at the Earth's surface, they are eventually carried into the stratosphere in a process that can take as long as two to five years.

Methyl chloroform, also known as 1,1,1-trichloroethane, is a colorless, non-flammable liquid that was once widely used as a solvent and in various industrial applications. It has the chemical formula CH₃CCl₃. While considered less toxic than other haloalkane solvents, it has been linked to potential health effects and is now regulated or banned in many countries due to its impact on the ozone layer.

Carbon monoxide (CO) is a colorless, odorless, and toxic gas produced by the incomplete burning of carbon-based fuels. It's a major air pollutant and can cause serious health problems due to its high affinity for hemoglobin in the blood, reducing oxygen-carrying capacity.

CO binds to hemoglobin in the blood, reducing its ability to transport oxygen to the body's organs and tissues. Exposure to CO can cause headaches, dizziness, nausea, fatigue, confusion, and in severe cases, death.

The culprit behind ozone depletion was not aerosols in aerosol cans, but the propellants we use as gases to propel the solutions inside. These gaseous propellants contain chlorine, which is released high in the stratosphere and depletes the ozone.

Trichlorofluoromethane can dissolve grease and used to clean electronic equipment. It is a highly stable compound and can sustain in the atmosphere for 80 to 100 years. Hence option (C) is the correct answer.

Since stratospheric clouds help chlorine compound to convert in chlorine particles depleting the ozone layer, their presence is also a factor responsible for the formation of the ozone hole.