Question

select the correct answer.
the ozone layer sits near the top of earths atmosphere and protects us from the suns harmful ultraviolet rays. but ozone is dangerous when its closer to ground level. which statement is true about ground - level ozone?
a. it contributes to nutrient pollution.
b. it directly causes acid rain.
c. it is the main component of smog.

Explanation:

• Nutrient pollution is mainly caused by excess nutrients like nitrogen and phosphorus (e.g., from fertilizers), not ozone. So option A is incorrect.
• Acid rain is mainly caused by sulfur dioxide and nitrogen oxides reacting with water vapor in the atmosphere. Ozone is not the direct cause of acid rain. So option B is incorrect.
• Ground - level ozone is a major component of smog. Smog (photochemical smog) is formed when pollutants like volatile organic compounds and nitrogen oxides react in the presence of sunlight, and ozone is a key part of this harmful mixture.

Answer:

C. It is the main component of smog.