Give one cause of World War I. Explain what it is and how it led to the war.
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Answer:
The poorer areas of the cities were characterised by overcrowded, badly built, unsanitary living accommodation, and filthy streets. Cholera, carried by dirty water, killed 16,000 Londoners in 1849 alone, and smallpox, scarlet fever, typhus, scurvy and rickets were rife.
