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[BONUS: REPLAY] The Rise of Air Conditioning

English Learning for Curious Minds

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The Limits of Air Conditioning

Hand fans have been used since the dawn of time to cool people down. The chinese inventor ging juan went a step further in the second century and invented a rotating fan. But there is a limit for quite how much the temperature can be reduced by natural meanseih, such as bringing cold water to a hot place. There was also, in much of the western world at least, a fear of trying to create artificial cold. Cold was something that people didn't really understand, and was thought to be something that only god could create.

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