... yes? Freon was used widely as far back as 1935. Invented in late 20's. | Hacker News

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emteycz on Feb 24, 2018 | parent | context | favorite | on: The Most Intolerant Wins: The Dictatorship of the ...

... yes? Freon was used widely as far back as 1935. Invented in late 20's.

tyingq on Feb 24, 2018 [–]

And overlapped with ammonia for quite some time.

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