Consider the following:1. Chlorofluorocarbons (CFCs)2. Halons3. Carbon tetrachloride4. Methyl chloroform.How many of the above are Ozone-Depleting Substances (ODS)?a)Only oneb)Only twoc)Only threed)All fourCorrect answer is option 'D'. Can you explain this answer?

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Consider the following:

1. Chlorofluorocarbons (CFCs)

2. Halons

3. Carbon tetrachloride

4. Methyl chloroform.

How many of the above are Ozone-Depleting Substances (ODS)?

a)
Only one
b)
Only two
c)
Only three
d)
All four

Correct answer is option 'D'. Can you explain this answer?

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Consider the following:1. Chlorofluorocarbons (CFCs)2. Halons3. Carbon...

A new study released June 11, 2024, has reported the first significant decrease in atmospheric concentrations of potent ozone-depleting substances (ODS) known as hydrochlorofluorocarbons (HCFCs).

About:

Ozone-Depleting Substances (ODS) are chemicals that cause the depletion of the stratospheric ozone layer.
- This layer is crucial for protecting life on Earth by absorbing the majority of the sun's harmful ultraviolet (UV) radiation.
The most common ODS include chlorofluorocarbons (CFCs), halons, carbon tetrachloride, and methyl chloroform.
ODS are substances commonly used in refrigerators, air conditioners, fire extinguishers, and aerosols.

The Montreal Protocol:

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.

Kigali Amendment to Montreal Protocol:

In 2016, Parties to the Montreal Protocol adopted the Kigali Amendment to phase down the production and consumption of hydrofluorocarbons (HFCs) worldwide.
HFCs are widely used alternatives to ODS such as hydrochlorofluorocarbons (HCFCs) and chlorofluorocarbons (CFCs), already controlled under the Protocol.

Hence option d is the correct answer.

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Consider the following:1. Chlorofluorocarbons (CFCs)2. Halons3. Carbon tetrachloride4. Methyl chloroform.How many of the above are Ozone-Depleting Substances (ODS)?a)Only oneb)Only twoc)Only threed)All fourCorrect answer is option 'D'. Can you explain this answer?

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