Ozone high in the stratosphere is useful. What about ozone at ground level, in city air?

It is a harmful pollutant that irritates the lungs and damages cropsCorrect answerYour answerIt repairs the ozone holeCorrect answerYour answerIt is harmless because it is the same as oxygenCorrect answerYour answerIt protects city people from sunburnCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer A

Correct answer: A

Ground-level ozone forms in photochemical smog from vehicle exhaust and sunlight.
It is a strong oxidising gas that harms breathing and plant leaves; it does not rise to refill the stratosphere.

Concept: Good ozone and bad ozone
Typical timeTypical: 60 s
Your timeYours: —

The rule this testsOzone layer and greenhouse effect

Practise this chapter →

Ten questions from Pollution, Climate and Conventions, at your own pace.

Practise this chapter →

Ten questions from Pollution, Climate and Conventions, at your own pace.

Practise this chapter All 67 questions in Pollution, Climate and Conventions Revise the notes for Pollution, Climate and Conventions

Ozone high in the stratosphere is useful. What about ozone at ground level, in city air?

Explanation