Question 19
Environmental PollutionEnvironmental pollution is worsened by the release from automobile exhausts of
- A.water vapour
- B.steam
- C.smoke
- D.heavy metals
Show the answer and explanation
Answer: C (smoke)
Explanation
Car exhausts give out smoke (soot and unburnt fuel) along with poisonous gases, which pollutes the air. Water vapour and steam are harmless.