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TIL of Joseph Bazalgette, a civil engineer who built an extensive sewer network in London which was instrumental in curbing cholera, typhus and typhoid epidemics. Later he started cleansing Thames.

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00EN TIL Blockbusting, a business practice used by real estate brokers to buy a house in a white neighbourhood, rent it to a black family, and buy the rest of the neighbourhood at a discounted price after urging nervous white families to leave the neighbourhood.
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