Which pollutant from motor car exhaust causes mental disease _____?
Correct answer: B. Lead
- A. Carbon dioxide
- B. Lead
- C. Sulpher Dioxide
- D. Mercury
Explanation
Lead particles and compounds from vehicle exhaust, especially from formerly leaded petrol, can damage the nervous system and impair mental development. Carbon dioxide is a greenhouse gas, but it is not the pollutant associated with this specific neurological effect.
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