Multiple choice general knowledge

Ozone pollution is worst at what time of day?

  1. afternoon

  2. early evening

  3. both

  4. none

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ground-level ozone pollution peaks in the afternoon because photochemical reactions between nitrogen oxides and volatile organic compounds require strong sunlight. These reactions build up throughout the day, reaching maximum concentration typically between 2-5 PM.