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17.4 smokers per square mile

The total land area on Earth is about 57.5 million square miles. There are approximately one billion smokers worldwide. By dividing the number of smokers worldwide by total land area, one would find that on average, there are about 17.391 smokers per square mile when distributed evenly. Of course in the real world, humans are not equally spread across the planet, meaning that there are areas that have more smokers than this and others that have less. This figure is therefore merely a mean estimate.

Sources

http://www.who.int/mediacentre/factsheets/fs339/en/

http://www.universetoday.com/25756/surface-area-of-the-earth/

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Q: How many people smoke cigarettes per square mile?
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