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How did Thomas Edison help make cities safer?

User Norbekoff
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Thomas Edison invented the most widely available version of the light bulb. With the advent of AC/DC electricity cities soon began to have streetlights. This would make for a good crime deterrent. 
User Kuldeep Choudhary
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How did Thomas Edison help make cities safer?

Light bulbs replaced gas lights and kept city streets well lit to reduce crime.

User Septiadi Agus
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