| In the 19th century, a British scientist named Michael Faraday discovered a theoretical idea of cooling inside environments. Freon is safer for humans than ammonea and methyl chloride, but not safe for the ozone layer. In the United States and Canada, the abbreviation for air conditioner is 'AC.' In Britain and Australia it is 'air-con.' The first building to be equipped with a crude air conditioner was the New York Stock Exchange. The first first chlorofluorocarbon gas used in air conditioning was called Freon. |
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