Sure, here is the step by step explanation:

1. CFC stands for Chlorofluorocarbons. These are types of compounds that were widely used in the 20th century, in applications such as air conditioning, refrigeration, blowing agents in foams, insulations and packing materials, propellants in aerosol cans, and as solvents.

2. The problem with CFCs is that they are very stable compounds. This means that they do not break down easily in the lower atmosphere after they are released.

3. Over time, these CFCs slowly rise into the upper atmosphere due to air currents and mixing.

4. When they reach the stratosphere (the second major layer of Earth's atmosphere), they are broken down by solar radiation, releasing chlorine atoms.

5. These chlorine atoms are capable of catalyzing the breakdown of ozone into oxygen. One chlorine atom can destroy many thousands of ozone molecules before it is removed from the stratosphere.

6. This process results in the depletion of the ozone layer, which is crucial for absorbing most of the Sun's harmful ultraviolet radiation.

7. The discovery of the Antarctic "ozone hole" by British Antarctic Survey scientists in 1985 was the first clear evidence that the ozone layer was being depleted. This led to the signing of the Montreal Protocol in 1987, an international treaty designed to protect the ozone layer by phasing out the production and consumption of numerous substances, including CFCs, that were responsible for ozone depletion.

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Sure, here is the step by step explanation:

1. CFC stands for Chlorofluorocarbons. These are types of compounds that were widely used in the 20th century, in applications such as air conditioning, refrigeration, blowing agents in foams, insulations and packing materials, propellants in aerosol cans, and as solvents.

2. The problem with CFCs is that they are very stable compounds. This means that they do not break down easily in the lower atmosphere after they are released.

3. Over time, these CFCs slowly rise into the upper atmosphere due to air currents and mixing.

4. When they reach the stratosphere (the second major layer of Earth's atmosphere), they are broken down by solar radiation, releasing chlorine atoms.

5. These chlorine atoms are capable of catalyzing the breakdown of ozone into oxygen. One chlorine atom can destroy many thousands of ozone molecules before it is removed from the stratosphere.

6. This process results in the depletion of the ozone layer, which is crucial for absorbing most of the Sun's harmful ultraviolet radiation.

7. The discovery of the Antarctic "ozone hole" by British Antarctic Survey scientists in 1985 was the first clear evidence that the ozone layer was being depleted. This led to the signing of the Montreal Protocol in 1987, an international treaty designed to protect the ozone layer by phasing out the production and consumption of numerous substances, including CFCs, that were responsible for ozone depletion.

Knowee AI · Accepted Answer

Sure, here is the step by step explanation:

1. CFC stands for Chlorofluorocarbons. These are types of compounds that were widely used in the 20th century, in applications such as air conditioning, refrigeration, blowing agents in foams, insulations and packing materials, propellants in aerosol cans, and as solvents.

2. The problem with CFCs is that they are very stable compounds. This means that they do not break down easily in the lower atmosphere after they are released.

3. Over time, these CFCs slowly rise into the upper atmosphere due to air currents and mixing.

4. When they reach the stratosphere (the second major layer of Earth's atmosphere), they are broken down by solar radiation, releasing chlorine atoms.

5. These chlorine atoms are capable of catalyzing the breakdown of ozone into oxygen. One chlorine atom can destroy many thousands of ozone molecules before it is removed from the stratosphere.

6. This process results in the depletion of the ozone layer, which is crucial for absorbing most of the Sun's harmful ultraviolet radiation.

7. The discovery of the Antarctic "ozone hole" by British Antarctic Survey scientists in 1985 was the first clear evidence that the ozone layer was being depleted. This led to the signing of the Montreal Protocol in 1987, an international treaty designed to protect the ozone layer by phasing out the production and consumption of numerous substances, including CFCs, that were responsible for ozone depletion.

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