Urbanization · UPSC GK

Which of the following was a biological consequence of the lack of sunlight in industrial cities due to smog and narrow alleys?

  1. An increase in Rickets cases among city children
  2. The evolution of night vision in humans
  3. A total immunity to the flu
  4. A gradual decrease in the average height of city residents
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Correct answer: An increase in Rickets cases among city children

Rickets became known as 'the English disease' because it was so prevalent among children in industrial cities. The combination of thick coal smoke (smog) and cramped housing meant children received very little direct sunlight.

Difficulty: Medium Question 17 of 20

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