Question : What is the primary cause of ozone layer depletion?
Option 1: Carbon dioxide emissions
Option 2: Deforestation
Option 3: Acid rain
Option 4: Chlorofluorocarbons (CFCs)
Correct Answer: Chlorofluorocarbons (CFCs)
Solution :
The correct answer is (d) Chlorofluorocarbons (CFCs)
The primary cause of ozone layer depletion is Chlorofluorocarbons (CFCs) Ozone layer depletion refers to the thinning of the ozone layer in the Earth's stratosphere, particularly in the region known as the ozone hole. The main culprits behind ozone depletion are human-made substances known as chlorofluorocarbons (CFCs) and other halocarbons, which were widely used in aerosols, refrigerants, foam-blowing agents, and other industrial applications. When released into the atmosphere, these chemicals can rise to the stratosphere and interact with sunlight, causing the breakdown of ozone molecules. This leads to the reduction of the ozone layer's ability to filter harmful ultraviolet (UV) radiation from the sun. Ozone layer depletion has significant environmental and health consequences, including an increased risk of skin cancer, cataracts, and harm to ecosystems. International efforts, such as the Montreal Protocol, have been undertaken to phase out the production and use of ozone-depleting substances and have shown positive results in the recovery of the ozone layer.
