Which of the following results does not occur due to burning of fossil fuels?

Correct option is D

The Correct answer is: (D) Depletion of ozone levels in the upper atmosphere

• Burning of fossil fuels primarily releases pollutants like smog, nitrogen oxides, sulfur oxides, which contribute to smog formation, acid rain, and global warming.
• Depletion of ozone levels in the upper atmosphere is mainly caused by chlorofluorocarbons (CFCs), not directly by the burning of fossil fuels.
  

Here’s a brief explanation of the other options:

• Smog is formed when pollutants like nitrogen oxides (NOx) and volatile organic compounds (VOCs) mix with sunlight, leading to the creation of ground-level ozone and fine particulate matter.

• Burning fossil fuels releases nitrogen oxides (NOx) and sulfur oxides (SOx) into the atmosphere, which can contribute to smog formation, acid rain, and air pollution.

• Acid rain occurs when sulfur oxides (SOx) and nitrogen oxides (NOx) mix with water in the atmosphere, forming sulfuric acid and nitric acid, which then fall to the ground as precipitation.