Which of the following is an ozone-depleting substance?

Ozone is produced naturally in the stratosphere. But this “good” ozone is gradually being destroyed by man-made chemicals referred to as ozone-depleting substances (ODS).

Key Points

Ozone-depleting substances are chemicals that destroy the earth’s protective ozone layer. They include:

• chlorofluorocarbons (CFCs)
• halon
• carbon tetrachloride (CCl4)
• methyl chloroform (CH3CCl3)
• hydro Bromo fluorocarbons (HBFCs)
• hydrochlorofluorocarbons (HCFCs)
• methyl bromide (CH3Br)
• bromochloromethane (CH2BrCl)

Therefore, Methyl chloride a kind of CFC is an ozone-depleting substance.

Additional InformationProduction and import of ODS are controlled by the Montreal Protocol on Substances that Deplete the Ozone Layer.

• Sulfur dioxide combines with water and air, it forms sulfuric acid, which is the main component of acid rain.
  • Acid rain can cause deforestation to acidify waterways to the detriment of aquatic life.
• Methane is the primary contributor to the formation of ground-level ozone, a hazardous air pollutant, and greenhouse gas.
• Carbon dioxide creates an overabundance of greenhouse gases that trap additional heat. This trapped heat leads to melting ice caps and rising ocean levels, which cause flooding.