Question

Give a biological reason for the following statement:

The use of CFC is banned in many countries.

Answer 1

Chlorofluorocarbons (CFC):

1. Chlorofluorocarbons are non-flammable organic compounds that contain carbon, chlorine, and fluorine.
2. CFCs are extensively used in air conditioners, refrigerators, and sprays.

Reasons to ban CFC use in countries:

1. Human activities have been releasing substances that have caused ozone layer depletion.
2. An ozone hole (a very thin layer) has been formed over Antarctica. A smaller hole has been formed over the Arctic region.
3. Ozone layer depletion is caused by ozone-depleting substances (ODS) like CFC. CFC reaches the ozone layer and causes chemical reactions that break down ozone molecules.
4. Due to ozone depletion, more harmful UV-B and UV-C reach the earth.
5. Ozone layer depletion causes cancers, eyesight problems, impaired immune system, mutations, decreased photosynthesis, etc.
6. The use of CFC is banned in many counties since it depletes the ozone layer.